111 FAQs, you will know what your child is missing after reading them

The college entrance examination is over and students are liberated, but parents regard summer vacation as \”two months that cannot be wasted.\” Therefore, many parents begin to plan what classes and things to enroll their children in during the summer vacation, and how to arrange their time during the summer vacation. . Anyway, I just want to fill up my schedule for my children during the two-month summer vacation. Some parents who are familiar with me often come to talk to me: Today’s children are lacking in everything, but why do I always feel that there is still something missing in the education for my children? In order to answer this question, I asked many Chinese immigrant families living in the United States, Australia, etc., observed the daily activities of these parents in WeChat Moments, and listened to some \”whys\” that American children often talk about. Finally, I came to this guess: If there is something that is most lacking in education in the city where I live in this era, then it may be \”nature\”. Here are 111 whys that American children often ask, and my answer. What these children ask most is not \”what is 11 times 11\” or \”how to get rich\”. The most frequently asked questions by these children are \”flowers, plants and trees\”, \”birds and animals\”, \”air environment\” and \”the meaning of life\”. 1. Do all plants grow leaves first and then bloom? Flowers and leaves bloom at about the same time; some plants grow leaves first and then bloom because their flower buds require higher temperatures than leaf buds to bloom. 2. Why do white or plain flowers smell so fragrant? In order to attract insects to pollinate them, flowers use all kinds of methods, some use color, some use fragrance, and some use sweet nectar. 3. Why are the petals of safflower red? The acidity of the cell fluid affects the color of the flower. If the cell fluid is acidic, the petals will be red; if it is neutral, the petals will be blue. 4. Can plants spread their own pollen? Plants that self-pollinate are fine. 5. Are only insects capable of transmitting pollen? In addition to insects such as bees and butterflies, some plants rely on bats and birds for pollination; many plants even find other ways to spread pollen by flies. Some plants rely on wind to spread pollen. Some plants also have other tricks to attract insects. 6. Why does eating pineapple make some people sick? Pineapple contains a kind of bromelain, which can break down protein and make people feel tingling and numb after eating, but salt can destroy this feeling. Some people are allergic to this enzyme in pineapples and may suffer from food poisoning if they are not washed with salt water. 7. Which part of the peach do we eat? peel. 8. Are the strawberries we eat meat or flowers? receptacle. 9. Does it really take a thousand years for the iron tree to bloom? Iron trees can be up to 200 years old. Generally, iron trees that are more than 10 years old can bloom frequently under good cultivation conditions. 10. How many plants do we need to provide the oxygen a person needs to breathe? Take tomatoes as an example: a tomato plant has about 250 leaves, and at least 45 tomatoes are required to perform photosynthesis continuously to provide a person with the oxygen he needs. 11. Why do some flowers have different colors in the morning and at noon? The color of the flowers isIt is determined by the anthocyanins in the petals, but anthocyanins are not stable and will change differently under different temperatures, humidity, and pH. 12. Why are there so few black flowers? The black flower cannot reflect any light, and if the heat is too high to absorb all the seven colors of light, it will be more likely to wither under the sunlight. However, under artificial cultivation, black roses, black tulips, black peonies, etc. have also appeared. 13. What are the largest and smallest flowers in the world? In the tropical forests of Sumatra, there is a parasitic plant called Rafflesia, also known as Rafflesia. It only blooms one flower in its life, but this flower blooms vigorously, with the largest diameter reaching 1.4 meters. The smallest flower in the world lives in water. In ordinary ponds and rice fields, there is an aquatic plant floating on the water surface. It is a rootless duckweed of the duckweed family. It has no roots and leaves. It is shaped like a small ball, about 1 mm long and less than 1 mm wide. The flowers are The diameter is only as large as the tip of a sewing needle. 14. Which tree is the largest in the world? Which tree is the tallest? The \”World Master\” tree currently standing in the National Park of the Americas in California, USA, is 83.79 meters tall and has a circumference of 34.93 meters measured 1.52 meters above the ground. Some parts of the reddish-brown bark are as thick as 60.96 meters. centimeter. In terms of tree height, there is a tree called Almond Eucalyptus in Australia, which is generally over 100 meters tall, with the tallest reaching 156 meters. 15. Why is the fragrance of tuberose stronger at night than during the day? There is a strange problem with the fragrant stomata on the tuberose petals: once the air humidity is high, it opens wide. When the stomata open wide, more aromatic oil evaporates. Although there is sunshine during the day, the humidity is much lower than at night. Although there is no sun at night, the air is very humid, so the stomata expand at night, the more aromatic oil is emitted, and the aroma will be particularly strong. 16. Why do epiphyllums always bloom at night? Epiphyllum is afraid of strong light, so its flowering time is always at night because there is no sunlight at night. 17. Many plants spread their seeds with the help of wind, but how do those heavier seeds spread? In addition to wind, plants growing in or near water rely on water to help spread their seeds. More plants rely on people or animals to spread their seeds or fruits. 18. Do plant seeds breathe? Simply storing seeds in a place without oxygen, cold temperatures, or dryness will greatly extend the life of your seeds. 19. Are cherries grown on cherry blossom trees? The cherry blossom fruit is shaped like a small ball, black, and tastes very bitter. Generally, no one would think of eating it. Cherries are round and red, and taste sweet and sour. Not only people like to eat them, but birds and animals also like them. 20. Are the cells in tree bark alive? Bark is actually equivalent to our human skin. It protects trees, protects plants from damage by diseases and insect pests, and can also avoid the effects of climate and temperature changes. 21. Is bamboo a tree or a grass? Bamboo flowers are not common. They only bloom and bear fruit in large quantities when encountering abnormal climate to produce vigorous offspring to adapt to new environmental conditions.. So do you think bamboo is a tree or a grass? 22. Why do some flowers bloom in the morning and some at night? Some flowers are entomophilous. They need insects such as bees and butterflies to spread pollen for them, so they will choose a suitable time to bloom according to the schedule of these insects. Some flowers bloom at night for this reason. What they need are some moths that are active at night to pollinate them. 23. Winter is so cold, how do trees survive the winter? Even though trees appear to be static on the surface in winter, they actually undergo great changes internally. Most of the leaves of pine and cypress trees are needle-shaped. In order to reduce the evaporation of water, there is a layer of waxy substance on the surface of the leaves. This is also to avoid the loss of water as much as possible. Annual herbs generally don\’t have to face this problem because they only live for one year and then die. However, they leave behind ways to regenerate next year or produce offspring. 24. Are bamboo shoots bamboo? Bamboo shoots are an ideal crude fiber food and are rich in various nutrients needed by the human body, such as sugars, proteins, fats, fibers, various mineral elements, and vitamins A, B, C, etc. 25. What are the largest and smallest seeds in the world? A kind of complex coconut tree that grows on the Seychelles Islands in the Indian Ocean in eastern Africa. Its seeds can be regarded as the biggest brother in the plant world. One seed is 50 centimeters long, with a groove in the center, like two coconuts put together. Same, weight is 15000 grams. The smallest seeds in the world are probably those of the velvet orchid. They are as small as dust. 500,000 seeds weigh less than 1 gram. As long as you breathe a little louder, they will be blown away without a trace. Once scattered on the wet ground, Young sprouts sprouted from the soil again. 26. If a fig has no flowers, where do its fruits come from? The flowers of figs bloom inside the epidermis, with male flowers on the upper part and female flowers on the lower part. Because the flowers are very small, their seeds are also very small. The Bible says that after eating the fruit of wisdom, Adam and Eve gained wisdom and began to realize their shame, so they covered their private parts with fig leaves. Therefore, figs have the reputation of \”the fruit of life\”. 27. If most of the seeds of fruits are inside, then where are the seeds of bananas? The bananas we often eat have no seeds because the current bananas have been improved after a long period of artificial selection and cultivation. Strictly speaking, the bananas we usually eat are not without seeds. When we eat bananas, we can see rows of small brown dots in the pulp. These are seeds, but they have not been fully developed and have degenerated into what they are now. . 28. Why do many plants, like animals, have to sleep at night? The most common phenomenon of plant \”sleeping\” is reflected in the leaves. Sleeping plants are especially common in the tropics. In tropical areas where the temperature is too high during the day, many flowers will choose to sleep during the day and bloom at night. 29. Are all plants vegetarian? Are there any plants that like to eat meat? Carnivorous plants mostly prey on insects. There is a kind of \”man-eating\” plant growing in South America – sunflower. Once a person accidentally touches it, it will be rolled up tightly, and the big spiders hiding on them will swarm in and kill them.After humans suck it all away, the spider\’s excrement becomes the fertilizer for the sunflower. 30. Why do apples taste so astringent before they are ripe but very sweet after they are ripe? Unripe apples have an astringent taste because their cell fluid contains tannins. When they mature, the tannins disappear and the astringent taste disappears. Also, there is a lot of starch in immature apples. During the ripening process of the apples, as the respiration increases, the starch is converted into sugar, so the ripe apples are particularly sweet. In addition, fruits will also produce some special lipids and aldehydes during the ripening process, and they are volatile, so we can feel the fragrance of the fruits. 31. Why are unripe apples green but turn red when ripe? When the apple matures, a substance called chlorophyllase in the apple will continue to increase, and this substance will continue to decompose chlorophyll, causing the chlorophyll to disappear. At this time, the carotenoids and flowers lurking in the fruit will The green pigment gradually appears. Carotenoids are yellow, orange or orange-red, while anthocyanins are red, so the fruit becomes yellow and red. 32. Does the ivy climbing on the high wall climb so high because it has legs? The roots on the ivy branches are different from the roots at the base of the stems of ordinary plants, so we call them adventitious roots; and because they grow in the air, they can also be called aerial roots. When I touch the young adventitious roots with my hands, I feel like some glue-like mucus is secreted out! Then carefully observe an older branch. Its color changes to yellowish brown, and its adventitious roots are all facing the wall or bark. If you pull it with your hands, you will know that it is firmly attached to the wall or bark. It does not take a long time. It cannot be pulled down with great strength. 33. How do seedless grapes grow? In terms of planting time, seedless grapes will have a short time. Growers will first take a branch or vine of a seedless grape, or look for a variety that mutates in nature, and then graft the branch or vine onto other grapevines. The next step is to take care of the grapes carefully and wait for them to grow up. 34. What are seeds? Fruit is the tissue that contains the seed and is the means to help the seed grow into a new plant. When the seed finally germinates, the fruit provides energy to the seed. Moreover, the seed is also spread by the fruit being eaten by animals. 35. If there is no sunlight, will the growth of sunflowers be affected? In plants, auxin is generally produced from the top of the plant. It can stimulate the growth of plant cells and plays an important role in the development of the plant. The auxin of sunflowers grows at the back of the flower disk. It is very afraid of sunlight, so throughout the day, As long as the sun moves, the auxin in its body will continue to move away from the sun, and the flower disk has no choice but to always turn toward the sun in order to protect the auxin. Although the auxin in sunflowers is \”fearful\” of sunlight, the organic matter and sugars required for the growth and development of the entire plant still come from photosynthesis that can only be carried out by absorbing sunlight. Therefore, if there is no sunlight, the growth of sunflowers will not only be seriously affected. The impact will not only cause the sunflowers to \”starve to death\”! 36. Why do coconut trees mostly grow along tropical coasts and islands?around? Coconuts use water to disperse their seeds. The fruit of coconut is a drupe. The outer pericarp is made of rough pine wood and the middle is made of solid brown fibers. When it is dropped into the water when mature, it will float on the water like a ball and will not rot. Sometimes it will They drift along the seawater for thousands of kilometers. Once they hit a shoal or are washed to the shore by the tide, they encounter a suitable environment, where they sprout, grow, and resettle. In addition, although coconut trees do not have very strict soil requirements, soil with sufficient moisture is most suitable. Around coastal islands, water is the most abundant, and seawater often washes the coast, leaving rich nutrients in the soil. , it also brings a lot of salt, and coconut trees especially like salty soil. When growing in such water and soil, with suitable temperature and sufficient sunlight, the leaves grow very fast and well. Coconut trees can grow up to seven or eight stories tall! Coconut trees bloom all year round, but coconuts only mature during the hottest time of the year. The special character of coconuts makes them particularly attached to high temperatures, so coconuts are most common along tropical coasts. Coconut trees always head towards the sea, traveling along the current to find a suitable place to grow. 37. Why are the leaves of coconut trees concentrated at the top of the stem, and why do coconut trees have no branches? If you want to know why coconut trees have no branches, you must first know why trees branch. Generally, there is a layer of cells with strong dividing ability between the bark and woody parts of trees. Through dividing activities, it continuously forms new phloem cells outward and new cells inward. In this way, the stem of the plant continues to become thicker. Grows up to form thick wood. The coconut tree has no cambium, and the stem is composed of many fibrous vascular bundles, so the thickness of the stem from the base to the top is basically the same. In addition, coconut trees only have one growing point at the top of the trunk tip. The growing point is broken or damaged, so the coconut tree has no branches. 38. Why are there corn kernels of different colors on the same corn cob? The homeland of corn is Central America. Because it has high yields, is not afraid of droughts and floods, and can be grown on hillsides, it is cultivated all over the world. Since the climate, soil, moisture and other external conditions vary from place to place, the cultivation methods are also different. Over time, many varieties have been formed, and people in different places have special preferences for different varieties and colors of corn. Therefore, through their planting and improvement, the colors of corn have also become richer. Corn is a cross-pollinated plant that relies on wind for pollination. The pollen of various corns floats in the air with the wind, so it is easy to hybridize with each other and produce seeds of various colors. 39. Why do we need to prune branches of plants? Doesn\’t this hurt them? Because the growth of plants depends on auxin in the plant body, auxin is generally distributed at the top of plant branches. Auxins have a bad problem. They can only promote the growth of the top and inhibit the growth of side branches. Therefore, pruning the branches of plants can ensure the healthy growth of plants. Too many branches will inevitably lead to excessive consumption of nutrients, and the trunk will become thinner and thinner. Even if it bears a lot of fruit, the branches cannot bear it. 40. DwarfingIs it just getting smaller? Generally, fruit trees grow shorter because they have been dwarfed. Because dwarf fruit trees can improve the utilization rate of light energy, thereby increasing the yield per unit area, the roots of dwarf fruit trees also have a wider range of nutrient absorption, which improves land utilization. 41. Why do seeds know when to germinate? For seeds to germinate, they must have a suitable climate and sufficient moisture. Especially when spring comes, the seeds are stimulated by external conditions and begin to germinate. Even if it is not spring, if you can provide them with an artificial and suitable environment, the seeds will germinate. 42. Are mushrooms plants? Do they need sunlight to grow? Mushrooms do not have chlorophyll. They do not rely on photosynthesis to produce organic substances to supply their own growth needs like ordinary green plants. Instead, they grow by decomposing mycelium and absorbing some ready-made organic substances and mineral salts from other organisms or biological remains and biological excretions. During reproduction, they have the ability to decompose organisms. In this process, they not only meet their own growth needs, but also release carbon dioxide, water and some inorganic salts, which can be used by other plants. If they are placed in the sun, they will not adapt due to the low humidity, which is why mushrooms like to grow in dark and humid environments. 43. Why do rice seedlings need to be transplanted instead of sowing seeds directly? Seedlings can be grown by sowing seeds directly into the field, but as the seedlings grow, the distance between the plants will become too crowded. In this way, the leaves cannot fully stretch and cannot get enough sunlight, and the underground roots are also crowded, so the rice will not grow well and the yield will be low. For this reason, the rice seedlings must be grown separately and then transplanted. 44. Is rice just rice? As the main source of food, the world\’s dependence on rice has reached a high level. In contrast, areas with cold climates prefer wheat, but in places such as South Asia, rice is the most important food crop. 45. I heard that some plants can predict earthquakes. Is there really such a plant? It is generally believed that the plant that best predicts earthquakes is mimosa. Before an earthquake strikes, it will behave in the opposite direction: it closes its leaves during the day and opens them at night. 46. ​​Why can’t the seeds of loquat, peach, and apricot be eaten? Loquats, peaches, and apricots are all fruits that people love to eat, but few people think that their soft and juicy pulp contains a dangerous intention that can cause death–seed kernels. If you eat them by mistake, They range from difficulty breathing and dilated pupils to severe convulsions, coma, convulsions, and even death. As for canned almonds or almond flour sold in stores, they have been fried and are of course edible. 47. There are a lot of sticky things on the trunk of the peach tree. What are they? Peach gum is secreted by peach trees to protect themselves from pests. Many pests like to suck the sap of peach trees, but once they are stuck by these glues, they are doomed. 48. Which plant in the world has the strongest alkali resistance? Salthorn grass grows in humid swamps with a high salt content of 0.5% to 6.5%. This plant has no leaves, the surface of the stem is thin and smooth, and the stomata are exposed., a large amount of soluble salts are accumulated in the cells of Salicornia to ensure the absorption of water. Cucumber is a common salt-alkali resistant plant. 49. Why do many weeds like to wander around? For example: In order to protect slopes, the United States introduced honeysuckle from Japan. However, this plant is too adaptable. Not only does it grow prosperously, it also crowds out other plants and dominates it. 50. Why is the sandalwood tree said to be \”shameful\”? When the sandalwood tree is young, it can still live a short-term independent life, relying on its own rich endosperm to provide nutrients, but when it grows up, it cannot survive because the nutrients are used up. At this time, it will grow beads like beads on the root system. A round sucker as big as a tree is tightly attached to the roots of the plants around it, and relies on absorbing nutrients produced by other plants. If the sandalwood tree cannot find a plant to be sucked to at this time, it will not be able to grow. Die slowly. In addition, the sandalwood tree is also very cautious. It relies on other plants to live, but cannot allow its host to grow better than it. If the plants around it grow more lush than the sandalwood tree, the sandalwood tree will soon \”die with hatred.\” , so there are usually a few \”malnourished\” and \”sallow-faced\” hosts growing next to lush sandalwood trees. However, although the sandalwood tree lives a disgraceful life, it is loved by people. The reason for this is that it is a kind of The precious spice, sandalwood tree contains an aromatic oil called \”sandalwood oil\”, so this wood has a rich and long-lasting aroma. 51. Can you plant just one banyan tree and let it reproduce the rest on its own? The banyan tree is an evergreen broad-leaved tree that likes high temperatures, rain, and high air humidity. It is found in low-altitude tropical rainforests and along coasts and deltas. Because the fruit of the banyan tree is sweet, birds like to eat it, so the hard and indigestible seeds are spread everywhere with bird droppings. They can be seen on the tops of ancient towers, ancient city walls and ancient house roofs in tropical and subtropical areas. From small banyan trees that are sown by birds, most of the small banyan trees that grow on big trees in tropical rainforests are also sown by small birds. This peculiar phenomenon of trees on trees constitutes a major landscape in tropical rainforests. 52. Are the raincoats we wear on rainy days made from the sap of rubber trees? You can say this or not, because now there is natural rubber obtained from rubber trees and artificial synthetic rubber. 53. Why does sumac bite people? This is because raw lacquer is poisonous and contains strong lacquer acid. When it sticks to the skin, it can easily cause skin allergies or poisoning, causing pain and itching, so it is mistaken for \”biting\”. The houses that people live in and the furniture and appliances they use are always painted with various colors of paint, which are not only beautiful but also durable. Among these paints, the most important kind of paint is cut from the lacquer tree, which is called raw lacquer. 54. Can flowers be eaten? The answer is yes, but the types of edible flowers are limited. Nowadays, it has been discovered that there are about a hundred kinds of edible flowers, such as sophora flowers, lotus flowers, peach blossoms, apricot blossoms, chrysanthemums, roses, etc., which can be made into delicious dishes, pastries, drinks, tea, wine and other foods. . 55. Are spindle trees woven? The spindle tree is the world\’s best storageIt is a water-resistant plant and can store more than two tons of water in its stem. During the dry season, people often cut down a spindle tree as a water source. If the average person drinks 3,000 grams of water per day, cutting down a hammer-proof tree can feed almost four people. I drink it for half a year. 56. Why do birch trees still have horizontal stripes on their bodies? What’s going on? These horizontal stripes are rows of breathing pores, also called lenticels. On the one hand, it takes away the dust, and on the other hand, it can breathe smoothly. In addition, one side of the bark of white birch is smooth, while the other side is bumpy and uneven. This is caused by different lighting conditions. For birch trees growing in the north, the smooth side points to the south, while the bumpy side points to the north. If you accidentally get lost in the wild, White Birch will be a good guide. 57. Why can lavender repel mosquitoes? Because the scent of lavender contains a special substance that is harmless to the human body, but mosquitoes hate this smell very much. Not only mosquitoes, but also cockroaches, flies and other bugs that we hate will avoid this smell, and these smells can also inhibit or kill bacteria and viruses. Many other plants have similar functions, such as lemon, crape myrtle, jasmine, orchid, lilac, mint, etc. However, some plants are not suitable to be placed in the bedroom at night. 58. What is the most vigorous plant in the world? Scientists have done many experiments and found that lichens can still grow even at ultra-low temperatures of -273°C, and then they are not afraid of high temperatures of 200°C, but this can also explain why in deserts, There are traces of lichens in both the Antarctic and the Arctic. 59. Are there any plants that can release oxygen at night? Of course there are, and most of them are plants we are familiar with. Like cacti, aloe vera, spider plants, etc., but they don\’t just release oxygen at night, they absorb carbon dioxide and release oxygen 24 hours a day. 60. Would it be better if the plants were kept in the sun? Do an experiment and use various methods to provide plants with sufficient light for 24 hours. I originally thought that the plants would grow vigorously. However, what I didn’t expect was that not only did the plants not grow healthily, on the contrary, after two days of exposure, , the leaves of the plant began to turn yellow, and on the third day, more and more yellow leaves appeared. If this continued, the plant would undoubtedly die. Therefore, we know that plants also need to rest. Although light is an indispensable condition for green plants to carry out photosynthesis, excessive light is not good for plants. We still have to let nature take its course, letting it work when the sun rises and when the sun comes in. And interest, such plants are the healthiest. 61. Are there any \”viviparous\” plants in the world? The most famous viviparous plant in the world is the mangrove tree found on tropical beaches. 62. Why can Populus euphratica grow in the desert? The reason why Populus euphratica can grow in the desert is because it has strong drought resistance: it has the ability to store water and prepares conditions for drought prevention. Like many desert plants, if you dig a hole in it, water will flow out. . Its old roots can still extend dozens of meters to the side, and new seedlings can sprout from each root. The plants are intertwined.section, which can prevent sand and solidify soil. Populus euphratica can also survive in salt-alkali. It can discharge excess salt-alkali through its trunk and leaves, avoiding the harm of salt-alkali. Populus euphratica has extremely strong vitality and can withstand both high temperature and low temperature. Therefore, Populus euphratica is The lifespan can reach more than a thousand years. 63. Can a cactus and an orange tree cross to produce offspring? By comparison, it\’s easier to cross plants than animals because plants often have more chromosomes than they contain, so you can cross lemons with limes, or broccoli with cauliflower, but cactus with oranges It seems that trees cannot be interbred because they are too distantly related. 64. Why do tea trees need to live in acidic soil? The reason why acidic soil is particularly suitable for growing tea is that tea trees need an acidic environment to grow. Secondly, from the perspective of the acidic soil itself, it has two outstanding properties. The first property is that it contains aluminum ions. The stronger the acidity, the more aluminum ions there are, while in neutral and generally alkaline soils Since aluminum cannot dissolve, there is little or no aluminum ion. Another characteristic of acidic soil is that it contains less calcium. Calcium is one of the necessary nutrients for plant growth, and tea trees are no exception. However, The tea tree does not require a lot of calcium, so it is required that the calcium content in the soil should not be too much. If it is too much, it will have negative consequences. Generally, the calcium content of acidic soil just meets this requirement, so it is particularly suitable for planting. tea tree. 65. Why do we burn lawns in winter? Will the grass be burned to death? Plants require the soil in which they grow to contain certain minerals, so that they can grow and develop through absorption and utilization. Generally, soil contains various mineral elements, but due to the continuous absorption of roots and the erosion of rain when plants grow, the mineral content of It is gradually decreasing, so crops must be fertilized. The growth of grass, like ordinary crops, also requires an appropriate amount of mineral nutrients. However, lawns rarely have the opportunity to be fertilized. In winter, the stems and leaves of the grass are burned to ashes with fire, and the minerals in the stems and leaves are retained. In the ash, the ash can penetrate into the soil with the rain. In this way, the minerals absorbed from the soil return to the soil, just like fertilization. The grass can use them when they sprout and grow in spring, so burning The lawn that has been burned will grow better than the one that has not been burned. Some people worry that burning the lawn will not burn the grass to death? No, when you burn your lawn, only the stems and leaves are burned. The underground rhizomes growing in the soil will not be affected. When spring comes, the grass can still grow vigorously. Even if it is not burned, the stems and leaves of the grass will remain. In winter, it will also wither, slowly rot, and then integrate into the soil, but the process is relatively slow. In comparison, burning the lawn is good for the growth of grass. 66. Why do people hate ragweed so much? Why must we get rid of it? Ragweed is very tall and can grow to over 1 meter tall. They bloom in July-August every year, but their flowers emit yellow misty pollen, which can cause hay and other respiratory diseases. Ragweed has a strong reproductive capacity. One ragweed can produce 70,000-year-old ragweed in a year. 100,000 seeds, seeds have 30-4It has a lifespan of 0 years and is particularly strong in vitality. It can grow even in barren and arid land. The real destructiveness of ragweed is that it covers and suppresses other plants, causing damage to the ecosystem, and its pollen causes air pollution, making it a harmful plant. That\’s why everyone works so hard to get rid of ragweed. 67. Are there any differences in color between indoor plants and outdoor plants? Outdoor plants can be completely bathed in sunlight, while indoor plants cannot be fully exposed to sunlight. A considerable part of the environment they live in is shade, so outdoor plants contain more chlorophyll than indoor plants and look greener. . 68. Why do the flowers in the vase wither so quickly? To make the flower arrangement longer, you can burn the cut ends of the flower branches with fire to partially carbonize them. This will make the bottom immersed in water less susceptible to bacterial infection and rot, and it can also make some of the flowers with milky leaves less susceptible to bacterial infection and rot. Plant milk does not flow out, preventing the ducts from being blocked, and it does not block the supply of water. 69. Why does Canada like the sugar in leaves? Can leaves produce sugar? Of course, there are trees in the world that can produce sugar, and that is the Canadian sugar maple. Sugar maple is a large tree with deciduous soil. Its trunk is rich in starch. This starch will be converted into sugar at low temperatures in winter. This sugar is stored in the sap of the xylem. In spring, when the temperature becomes warmer, the sap begins to flow. The sugar will turn into sweet sap. This sweet sap is very easy to obtain. Just drill a hole in the trunk of the tree and the sweet sap will flow out of the hole continuously. Syrup boiled from sugar maple sap, commonly known as \”maple sugar\”, has high nutritional value, comparable to honey, and has the effects of moisturizing the lungs and appetizing. So Canada takes great care of their sugar maple trees, and even the flag is in the shape of a maple leaf. 70. Why are the roots of many plants covered with “tumors”? Are they sick? It\’s not because of illness, but because of the invasion of bacteria. However, don\’t worry, because these bacteria will not harm the plants, but will also greatly benefit the growth and development of the plants. Why do you say this? This is because the growth and development of plants requires an element called \”nitrogen\”. Although there is a lot of nitrogen in the atmosphere, plants cannot use it directly. Without this element, plants cannot Healthy growth, and these bacteria called \”rhizobia\” can help plants solve this problem. They can fix nitrogen in the air for the growth and development of plants. However, rhizobia are not voluntary workers. They rely on leguminous plants to provide water and nutrients to survive. Therefore, these two organisms are interdependent. In biology, this phenomenon is called \”symbiosis.\” Due to the nitrogen fixation effect of rhizobia, leguminous plants contain high nitrogen content, so many leguminous plants can be used as green manure, such as alfalfa and milkvetch. 71. I heard that many plants can cause cancer. Is this true? After careful observation and research by scientists, 52 types of plants that can cause cancer have been discovered so far. The substances we are familiar with that can cause cancer include: croton, tung tree, datura, broad-leaf kiwi, etc. 72. If some plants eat insects, then there are some in the worldA plant that eats people? A kind of glazed grass that grows in Romania emits an odor. After the mice smell it, they start to jump violently and soon die. It turns out that this odor contains a series of alkaloids that act on the nervous system. For this reason, people use these active ingredients to make rodenticides. 73. Why do roses have thorns? This is an ability of self-protection. In order to prevent being eaten by herbivores, it has grown a \”thorn armor\” so that it will not be easily eaten. But there is a type of herbaceous plant that also has thorns. Its thorns are not hard, but they are very special. The thorns are hollow and contain a kind of venom. If humans or animals come into contact, the thorns will break automatically and inject the venom into the enemy\’s body. in the skin, causing redness, swelling or itching. Therefore, wild animals dare not invade them. The most typical of this kind of grass is scorpion grass, which belongs to the Urticaceae family. They often grow in relatively humid and shady places, and are more common in ravines. Or under the woods. 74. Are there any trees harder than steel? This kind of tree is called iron birch. It is said that a bullet hitting this kind of wood will not move at all like hitting a thick iron plate! Moreover, according to tests by scientists, iron birch is twice as hard as ordinary steel. Take a piece of iron birch and put it in the water. It will immediately sink to the bottom like lead, and because of the dense texture of iron birch, , the waterproof performance is very good, even if it is soaked in water for a long time, it can keep the interior dry, so iron birch can sometimes be used as a substitute for steel and used in the national defense industry. The iron birch tree is very precious. It is about 20 meters tall, has a trunk diameter of 70 centimeters, and has a lifespan of 300-350 years. What makes it precious is that its distribution range is very narrow and concentrated. In addition to iron birch, there are also hard maple, yellow birch, white birch, white oak, beech, cherry tree, red alder and other trees that are also very hard. 75. Is there also a \”Hercules\” in the fruit? The fungus is native to southern Europe. Its fruit is like a large cucumber. When it matures, the pulp containing the seeds turns into a viscous liquid, which crowds the inside of the fruit and swells strongly and squeezes the peel. At this time, Once the fruit is touched, it will explode with a \”pop\” sound, just like a filled balloon being punctured. The force of the spray melon is very strong and can shoot the seeds and mucus 15-20 meters away. . 76. Where can I find the lightest wood? Balsa wood growing in the tropical forests of America is the lightest wood in the world. Although the wood of balsa wood is light in texture, its structure is very strong. Therefore, it is a valuable material for aviation, navigation and other special crafts. We also use it for insulation. Bottle stopper. 77. Some trees also have tumors. Is it harmless? Tumors on plants have an impact on the growth of plants. They will affect the normal metabolism of plants, interfere with the flowering and fruiting of plants, and in severe cases, can even lead to the death of plants. 78. Is there a difference between friends and enemies among plants? Onions and carrots are good friends. The smells they emit can drive away each other\’s pests. The smell of castor can protect soybeans from chafers. Sowing peas and cotton in winter wheat fields can encourage them to grow more fruits. If you put lilac flowersPlanted together with narcissus, the aroma of lilacs will make it difficult for the narcissus to live; mint and laurel can secrete a large amount of aromatic substances, which will inhibit the surrounding plants. 79. Can we grow plants indoors? It is very good to keep plants such as aloe vera, spider plant and sansevieria at home. They can remove harmful substances from the air. Studies have shown that sansevieria and spider plant can absorb more than 80% of indoor harmful gases, and aloe vera can absorb 90% of indoor formaldehyde. 80. Some plants can make wine. Is it because they contain alcohol? This is the anaerobic respiration of plants. Anaerobic respiration occurs when the oxygen supply is insufficient. It is the abnormal respiration of plants. During this process, due to the lack of oxygen, plants cannot completely oxidize and decompose sugars in the body and can only They decompose incomplete oxides and release a small amount of energy, and those incomplete oxides are alcohol, lactic acid and other substances. Therefore, wine making utilizes the anaerobic respiration of grains and other food crops to ferment them and produce alcohol. 81. Why can aloe vera make people beautiful? Aloe vera has a variety of active nutrients such as natural moisturizing factors, anti-ultraviolet factors, anti-inflammatory and bacteriostatic agents, vitamins, trace elements, fruit acids, mono acids and 17 kinds of amino acids. The water content in the fresh leaves of aloe vera accounts for the weight of the fresh leaves of aloe vera. 99%-99.5%, this is the original natural biological water, which has the functions of moisturizing, sun protection, anti-wrinkle, removing freckles, promoting skin metabolism, regulating skin microcirculation and delaying aging, so it is said that aloe vera can make people beautiful. Aloe vera can eliminate dirt and dust on the surface of the skin, effectively resist sunlight and environmental damage to the skin, make spots lighter and lighter, promote skin metabolism and blood circulation, and delay skin aging. 82. Why can’t fruits replace vegetables? 1. Fruits generally contain fewer nutrients than vegetables, while green leafy vegetables contain high levels of vitamins and iron, which are very important for the growth and development of teenagers. 2. Vegetables contain a large amount of insoluble dietary fiber, which can promote intestinal peristalsis and clean the intestines. Fruit contains mainly pectin – soluble fiber, which is not easily absorbed. In addition, the sugars in fruits are mostly monosaccharides and disaccharides, which can quickly dissolve into the blood, causing a rapid increase in blood sugar concentration, which is not good for health. Vegetables, on the other hand, are mostly starchy polysaccharides, which need to be decomposed by the body before they can be slowly absorbed. It will not cause large fluctuations in human blood sugar. 83. What will happen if the seeds are taken to space? Scientists have already done this kind of experiment. They took the seeds of Western red pomegranate to space and conducted space capsule experiments. After returning to the earth and planting them, the production of Western red pomegranate increased significantly, showing abnormal advantages that cannot be achieved on the ground. Scientists believe that in the natural environment, the process of mutation of plant seeds is slow. However, once in the microgravity environment of space, the situation is quite different. In space, plants are affected by various physical radiations, so their genetic performance must be strongly affected. After plant seeds are hit by high-energy heavy particles from cosmic rays, more multiple chromosomal aberrations will appear. Microgravity also has a certain mutagenic effect on plant seeds, which increases the sensitivity of other mutagenic factors and inhibits deoxyriboseThe damage and repair of nucleic acids ultimately aggravates chromosome damage. At the same time, the strong vibrations and impulses generated during the launch and landing of spacecraft such as satellites will also cause mutations in plant genetic properties. 84. Are mimosa really \”shy\”? Why does the mimosa move? This is all due to the \”turgor effect\” of its leaves. At the base of the Mimosa petiole, there is a \”bulging\” parenchyma cell tissue – the leaf mattress, which is full of water. When you gently touch the Mimosa with your hand, the leaves vibrate and the water flows from bottom to top. , so the lower part of the leaf mattress deflated like a deflated rubber ball, while the upper part swelled like a fully inflated rubber ball due to the inflow of water. Why does Mimosa have such a strange temper? Of course, it is beneficial to its growth and an adaptation to natural conditions; in the south, where mimosa grows, there are often violent winds and rains. If the Mimosa plant doesn\’t collect its leaves at the first drop of rain or the first gust of wind, then the violent storm will destroy the delicate leaves of the Mimosa plant. 85. Can plants still live after leaving the soil? No, because they need some nutrients from the soil. The most important thing is nitrogen. 86. Plants need to produce their own sugar to grow. Is it good if we directly pour sugar water on it? This is not good for the plants, because plants can produce the sugar they need through photosynthesis, and they do not need to absorb it from the roots. Moreover, sugar water is not only not beneficial to the plants, but will bring disaster to the plants, because the sugar will attract ants, and Plants have nothing to do with these uninvited guests. 87. Is ginkgo related to almonds? It doesn\’t matter. Ginkgo has a strong growth capacity and a lifespan of more than 3,000 years. It is also known as the \”longevity tree\”. It is also an ideal greening plant. It is resistant to dust and poisonous gases. Because of its beautiful shape, the ginkgo tree is an ideal garden plant. 88. How do plants live in water? Many aquatic plants live in water all year round, and their leaves become filamentous, which not only increases the area of ​​light, but also allows the carbon dioxide dissolved in the water to better enter the leaves, and also reduces the impact of water on the leaves. blade pressure. The oxygen content in water is less than 1/20 of that in air. In order to obtain more oxygen, another feature of aquatic plants is that they have many ventilation channels. Take the lotus, for example, its abnormal stem-the lotus root is full of stomata, and the petiole of the lotus leaf is also covered with air passages, and the stomata and the air passages are connected, so that the petiole can transmit air to the lotus root through the stomata. . 89. What is the earliest plant on earth? Cyanobacteria 90. Plants grow better under natural light than under artificial light? It depends on what kind of light you give the plants. Most of the leaves of plants are green. What will happen to the plants if they are just exposed to green light? The answer is unexpected, they will die. Plants are green because they can reflect the green light of the sun. This means that plants rarely use green light for photosynthesis, so if the plants are only irradiated Green light is equivalent to placing the plants in darkness, so that the plants cannot absorb any light. 91. Is red tide a red tide? Red tide usually refers to marine microalgae, bacteria and protozoaA phenomenon in which animals proliferate or gather excessively in seawater, causing the seawater to change color. Marine planktonic microalgae are the \”main force\” in causing red tides. Red tides are not necessarily red. Due to the different colors of the main algae that cause red tides, the colors of red tides are also different. Red tides often appear in red, brown, blue, green, milky white, etc. 92. Why are poppies so beautiful but forbidden to grow? Although the poppy flower itself is not poisonous, it is the raw material for opium products. Drugs such as opium, morphine, heroin, and cocaine can be obtained from the poppy. When the poppy flowers are fully mature, the poppy peel is cut, and the milky white juice oozes out. After natural air drying, it condenses into a dark brown sticky paste. After being left for a long time, as the moisture slowly erodes, It disappears and turns into a brown-black hard lump. This is opium. 93. Why is the tree trunk round? When the circumference is the same, the circle has the largest area. In this way, the number of vessels, cells, etc. in the round trunk can reach the maximum, and the trunk\’s ability to transport water and nutrients is also maximized; secondly, the cylindrical shape is also larger in volume than other cylinders, and the trunk\’s bearing capacity is also It reaches the maximum value, especially when the trees are full of fruits in autumn, the trunk can strongly support the crown without becoming bent; again, under the same volume, the surface area of ​​the cylinder is the smallest, so that the contact between the stem and the air The surface is the least, and the amount of water evaporation can also be controlled to the smallest extent. In addition, the tree trunk can also effectively prevent external damage. Since the cylindrical shape has no edges and corners, when the wind blows, the wind can pass along the cylindrical trunk, reducing wind damage to the trunk and playing a role in self-protection. 94. Where is the thickest tree in the world? There is a big chestnut tree in Sicily, Italy. The circumference of the trunk is 55 meters. It takes more than 30 people to surround it. There is a big hole in the lower part of the tree, and chestnut pickers use it as a warehouse. 95. What would happen to humans if there were no plants on the earth? Death 96. Are there any plants that do not grow roots? Plants such as mosses and liverworts do not have a vascular system. Their cells can absorb water directly from the air. Some of these plants have rhizoids that look like roots, which can hold them in place but cannot transport water. We call them These plants are collectively called bryophytes. 97. How do you know how old a big tree is? In spring and summer, the growth and development of trees are in a prosperous period, and the cells that divide in the germinal layer are large and numerous, so the annual rings are light in color and wide in distance. However, in autumn and winter, the opposite is true, and the generated annual rings are in heavy color. , the distance is narrow. In years with suitable climate, trees grow in good condition, the germinal layer is frequently active and divides quickly, and the annual rings will be wider, while in years with harsh environment, the annual rings will be narrower. In addition, in the first few years of a tree\’s growth, the annual rings are generally wider, which is when its vitality is the most vigorous. After that, the annual rings will gradually become narrower, and generally in the northern hemisphere, because the south is warmer than the north, so The growth rings on the south-facing side will be wider. Since the activities of the generative layer have certain rules, some trees can produce several annual rings in a year, which are called false annual rings. Therefore, the number of annual rings is used.Determining the age of a tree is only an approximate method and is not 100% correct. 98. What is the longest tree in the world? So far, the oldest tree in the world is a bristlecone pine living in California, USA. People named it \”Methuselah\”. It is 4766 years old this year. There was once a tree that lived longer than \”Methuselah\”. It was a dragon\’s blood tree. It was at least 8,000 years old. Unfortunately, in the 19th century, the \”old and frail\” longevity tree could not withstand it. The raging storm, died in the storm. 99. Why do the trees in the forest grow so tall? When in the forest, there are many trees, life is very crowded, and not every tree can fully bathe in sunlight. So in order to get sunlight, the trees will try their best to grow upwards, fighting for each other, and finally the trees will become taller and straighter. The growth of plant stems is because the top cells of plant stems can produce auxin, which can stimulate cell division. The growth of plants is the result of cell division at the top. The divided cells will continue to be elongated, so the stems It will grow taller and taller. 100. What is ecological balance? Plants absorb carbon dioxide and release oxygen, while animals and bacteria do the opposite. In this way, life on the entire earth will reach a balance. Therefore, every living thing is a member of the earth tree. It will not work if any link is missing. . 101. Are all plants in the water green? The leaves of red amaranth and begonia are often red or purple. This is because there are more anthocyanins in their leaves, which cover the chlorophyll, so they look red. 102. In winter, all the leaves of plants fall off. Where does the oxygen we breathe come from? In fact, the oxygen produced by photosynthesis of deciduous trees is relatively limited. Even if all the leaves fall off in winter, it will not cause an imbalance in the global oxygen supply. Because the world\’s main photosynthesis occurs in large areas of tropical rainforests, where it is warm and rainy all year round. There is no winter and the leaves are green all year round. Photosynthesis can be carried out uninterrupted all year round, providing enough oxygen for animals. In addition, there is another important source of our oxygen, which is the ocean. The ocean occupies 3/4 of the earth\’s surface area, where a large number of algae that can perform photosynthesis live. The oxygen released by the algae comes from seawater. Penetrating into the air, they provide 1/2 of the world\’s oxygen, so we will have enough oxygen in the bare winter. 103. Why can marine plants survive without sunlight? Sunlight can spread to 180 meters below the ocean surface, which is called the photic layer. 90% of marine life lives in this area, including all marine plants. There is no sunlight below 180 meters, and there are no plants because of the loss of sunlight. Plants cannot live. 104. What do cacti in the desert rely on to preserve the water in their bodies from evaporation? In fact, not only cacti, many desert plants do not grow leaves, but are covered with sharp thorns. These thorns are actually degenerated leaves. It turns out that because the desert is too hot, the sunlightIt\’s amazing. If the leaves of the plant are wide and large, the water will be evaporated quickly, and the spiny leaves allow the cactus to retain as much water as possible in the body, so that they can survive in the desert where water is scarce. Went down. Most of the cactus flowers are brightly colored, but the flowering period is generally short. Cactus contains a large amount of protein, minerals, vitamins, amino acids, carotene and more than 20 nutrients such as zinc, iron, strontium, calcium, potassium and phosphorus. It has high medicinal and edible value. Put a cactus in the room and haven\’t watered it for 6 years, but it still grows vigorously, but the weight is reduced by 11 kilograms. If it is in the desert, the life span of cactus plants will be much longer than this. Because these special characteristics have evolved to adapt to the harsh climate in the desert. 105. Do plants also need to absorb oxygen like humans? During the day, plants seem to only perform photosynthesis, inhaling carbon dioxide and spitting out oxygen. At night, when the sunlight is gone, photosynthesis stops. At this time, plants can only perform respiration, sucking in oxygen and spitting out carbon dioxide. Plants, like humans, need oxygen to breathe, but because photosynthesis is greater than respiration, plants generally absorb carbon dioxide and release oxygen. Without air, plants will be suffocated and starved to death. Sometimes when water accumulates in the fields for a long time, the roots of drought-tolerant crops such as soybeans and cotton will die because they cannot get oxygen and cannot breathe normally. This is the reason. . 106. What is the most poisonous plant in the world? The castor bean plant is the most poisonous of all plants, and even if you are an adult, eating one or two castor beans will probably kill you. Castor beans contain a toxic substance called ricin, which can prevent cells from producing protein. In the absence of protein, cells will die. This will cause serious damage to the human body and eventually death. . 107. How do plants take root in the desert? In general, due to the high temperature and lack of water in deserts, the above-ground parts of plants appear very small, but their roots are cavernous. Camel thorn is a common plant in the desert, with a height of 60-130 cm, but its roots are 5 -6 meters and even deeper. 108. Can the stem of a plant be compared to the backbone of a human being? Like celery, the middle part of its stem has degenerated, which can allow more nutrients to be absorbed by the cells on the stem, allowing them to grow strong and strong, so that the plant is not easy to break. In addition, the hollow stem is also conducive to ventilation. . 109. If the winter is so cold, will the sap inside the tree trunk be frozen? Is the wood cut down at this time very dry? In winter, the sap in the trunk will not disappear. The liquid sap in the living cells of the tree contains a natural antifreeze, which is a soluble organic and inorganic chemical substance. Therefore, in the trunk The sap rarely freezes. If the wood is split and stacked, it will take about six months for them to dry completely. 110. Why are the “heads” of leaves pointed? This tip is used to allow the leaves to drain water quickly. Whenever it rains, the rainwater falls on the leaves. If the tip of the leaf is consistent with its \”body\”If it is so round, the water will flow away from the leaves very slowly, and more water will accumulate. If the leaves are soaked in water for a long time, they will rot easily, and too much water will accumulate inside the leaves. The tender leaves cannot withstand that much pressure and are easily crushed. 111. Why do leaves have veins? What is the function of leaf veins? These leaf veins are like human blood vessels. The roots of the plant absorb water and nutrients from the soil, and transport them to various parts through these blood vessels to ensure the plant\’s demand for nutrients. It also serves to support leaves (like human bones).