Can Venus flytrap really eat insects?
Yes, because of the lack of some nutrients, the leaves of venus flytrap gradually change, and the demand for nutrients is met by catching and digesting insects. Not all these insect-eating plants feed on insects. But insects will grow stronger after eating them.
Can castor seeds be eaten?
I can't. Because castor seeds are very toxic, people will be poisoned if they eat them. Although you can't eat it, it is very useful. It can be made into castor oil to be used on airplanes, and it can also be used to detoxify and treat people as medicine.
Why do rice seeds hatch?
Before sowing, rice should hatch into neat and delicate white buds at home. One is to catch up with the season; Second, it is easy to take care of; The third is to avoid bird pecking and wind and rain. Wind and rain will make seeds move and distribute unevenly. Seeds with well-hatched buds take root faster, and will not move despite the wind and rain.
Why do rice seedlings rot in rice seedling fields?
After sowing, the weather is hot and cold, and suddenly it is attacked by cold wave or frost, and the buds will freeze to death if they can't stand it. If the paddy field is uneven, there will be more water in the low-lying areas, or the seeds or seedlings will die because of lack of oxygen in cold water. The manure or manure in the seedling field does not decompose, but continues to ferment, releasing harmful gases, causing the young roots to turn black and die. Rice seeds carry germs, or there are germs in the seedling field, which will make the seedlings sick and die. Weeds such as moss grow in the seedling field, and competing with seedlings for territory will also cause rotten seedlings. Birds peck at rice seeds, and pests gnaw at seedlings, resulting in rotten seedlings.
What's the use of cocoa trees?
The seed of cocoa tree is the main raw material for making chocolate. Chocolate is made of cocoa powder, and some sand grains, spices and nuts are added.
Why do vegetables taste better after the first frost?
Frosted vegetables will convert starch into sugar in order to resist the cold, so the taste will change.
Why can't people who are allergic to paint eat mangoes?
Mango belongs to the Rhus family, and contains monohydroxy benzene or dihydroxy benzene, which is similar to the ingredients usually contained in paint. It has a great stimulating effect on skin and mucosa, and it is particularly easy to cause allergies.
What flowers and plants have good mosquito repellent effect?
Geranium can emit fresh and elegant lemon fragrance, which has a good mosquito repellent effect indoors. The higher the temperature, the better the mosquito repellent effect. Mosquito repellent plants include pyrethrum, Qilixiang, Cordyceps, Drosophila melanogaster, Zanthoxylum bungeanum, eucalyptus citriodora, mint, lavender, Artemisia argyi, cordate telosma and jasmine.
Which plants eat animals?
Common herbivorous plants are Lauraceae, Venus flytrap, Nepenthes, Nepenthes and so on. They generally grow in harsh environments. In order to get the nutrients needed for growth, some parts of them, such as leaves, are specialized into insect traps, which prey on mosquitoes, flies and small beetles.
Does the flower have a sound?
When flowers bloom, with the movement of flower organs, a certain sound will be produced, but it is difficult for human ears to distinguish this sound.
How to tell the sex of plants?
A complete flower consists of six basic parts, namely, pedicel, receptacle, calyx, corolla, stamen group and pistil group. Most plants have both stamens and pistils on the same flower, that is, bisexual flowers. This kind of plants can be divided into male and female, such as pumpkin, cucumber, paulownia, corn, zucchini, pea, oak and so on. Some plants have two kinds of unisexual flowers in one plant, which can also be pollinated in the same plant, so it is generally difficult to distinguish between male and female plants; Some plants have only one kind of unisexual flower on a plant, such as poplar, willow, ginkgo, Podocarpus and so on.
What is the longest-lived plant in the world?
The "dragon blood tree" growing in Africa can generally live for 2000 years, and some can live for five or six thousand years, or even 8000 to 10000 years.
What is China's first botanical monograph?
China's first botany monograph appeared in the early 4th century, the Southern Vegetation written by Han Ji in the Western Jin Dynasty. It is the earliest existing local flora in the world, and describes the morphology, living environment, uses and origins of 80 species of plants.
Are there inbreeding or alternate generations of plants?
Existence. For example, the same plant always breeds in a small area, and the offspring of a plant pollinates its parents. This situation will not affect the normal reproduction of plants. The real evolution process of plants mainly depends on the variation (including gene mutation) brought by foreign genes, so as to realize the survival of the fittest. However, long-term inbreeding of some plants will also cause variety degradation.
Do plants have biological clocks?
Of course there is. For example, the flowering time of plants and the sleeping behavior of leaves are dominated by the biological clock of plants, and are also manifested in various physiological phenomena such as respiration, photosynthesis and growth rate of plants.
Which plants glow?
Because there are a lot of phosphorus in plants, phosphorus will emit luminescence when it comes into contact with air, such as "luminous tree" in northern Africa, "cordate telosma" in Cuba and "lantern tree" in Jinggangshan area of China. The brightness of this phosphorescence is proportional to the size of the tree.
What's the secret of flower color?
Why are flowers born on alpine snowfields generally light in color, while tropical flowers are strong and bright in color? Because flowers contain anthocyanins, anthocyanins, carotenoids and other substances. Anthocyanins can be colored according to the pH of leaves and the temperature of the surrounding environment. The pH of each planting object is different, so the color is naturally different. In addition, temperature will also affect the discoloration of anthocyanins, so the temperature is low in the morning and the color of flowers is light; When the temperature is high in the afternoon, the color becomes darker. The color difference between the plateau and the tropics is caused by temperature.
Roses are all varieties of Chinese rose, right?
Roses and roses are native to China. In China, Hongkong, Taiwan Province Province, Guangdong and other regions, the rose has always been called the rose due to the influence of foreign countries. Botanically speaking, "Rose" and "Rose" are two different "species" belonging to Rosaceae. Although they look alike, they are easy to identify by "seeing, touching and smelling". At first glance: from the lobule point of view, the lobule of roses is generally around 3, while the lobule of roses is generally between 5 and 9; Touch 2: Touch the stem. The thorns on the stem of the rose are relatively large, with about three or four in each section, while the thorns on the stem of the rose are relatively dense; Three smells: the rose is rich in fragrance, and the rose has almost no taste.
Are there any plants that can walk or move?
Yes In the east and west of the United States, there is an "awakening tree" that can grow peacefully in places with sufficient water. Once there is drought and water shortage, it will "pull" its roots out of the soil and roll them into a ball. Follow the wind, stretch the curly roots when you meet water, insert them into the soil, and start a new life. When drought comes, tumbleweeds in the Gobi desert in the northeast will also collect their roots from the soil and roll them into a ball with the wind.
Animals have parasites, but do plants?
Plants also have parasites. Some plants are parasitic on other plants and maintain their lives by absorbing nutrients from parasitic plants. This phenomenon is called "parasitism". Common parasitic plants are dodder, sorghum, Agkistrodon acutus, mistletoe, mistletoe, rootless vine and so on.
Why do the fallen leaves face up?
The anterior cells of leaves are arranged neatly and tightly, and contain many chloroplasts, which are called palisade tissue. On the other hand, the chloroplasts in the posterior cells are less and loosely arranged, which is called sponge tissue and lighter than the anterior cells. The front is more important than the back, so when the leaves fall to the ground, the back is often upward.
Which plants have the bionic function of color change and mimicry?
Among the mimicry plants, Phalaenopsis is the most striking one, which is a rhinoceros of Tilapiaceae family. In order to get pollination from the rhinoceros bee, its flowers look like the body of a female rhinoceros bee. In some stone clumps in southern Africa, there is a plant called "raw stone flower", whose thick leaves look like pebbles in color and shape; In the Himalayan region of China, "POTAMOGETON" looks like a cobra with its head held high and its tongue sticking out, which often frightens some small herbivores.
Why can't germinated potatoes be eaten?
The potato people eat is its tuber. The stem has internodes, terminal buds and lateral buds, but the root does not. Solanum nigrum is an alkaloid harmful to human body. Once the potato germinates, the content of Solanum nigrum around the bud increases sharply, reaching 40 to 70 times of the usual content. People may have nausea, vomiting, abdominal pain and diarrhea after eating it. In severe cases, dehydration, blood pressure drop, dyspnea, coma, convulsions and other symptoms may occur, and in severe cases, people may die of cardiopulmonary paralysis.
What can tree rings tell us?
Tree rings contain a lot of information about climate, astronomy, medicine and environment. Historically, if you encounter shipwrecks in past dynasties, you can determine the tree species of shipbuilding according to the pattern of annual rings of wooden boats, and infer the age of death according to the corrosion; In meteorology, we can infer the paleoclimate change for thousands of years by the width of the annual rings. The width of annual rings indicates that there is plenty of sunshine and the climate is suitable, while the width of annual rings indicates that the temperature is low, the rainfall is low and the climate is bad.
Lemon eucalyptus is naked. Does it have no bark?
Lemon eucalyptus has bark, but after the bark falls off one by one, the new bark is smoother. Other trees with smooth bark include poplar and phoenix tree.
Why do Cycas bloom so little?
Cycas cycas is one of the most primitive seed plants existing on the earth. The flowering of Cycas has a strong regional character. It likes damp heat and good light, while the rainfall in northern China is less and dry. Cycas often take decades or even hundreds of years to bloom, and some even don't bloom for life. Cycas growing in the tropics can blossom and bear fruit every year after 10 years.
What tips can you get from plants when you get lost in the wild?
If the trees don't grow very densely, you can usually tell the north from the trunk: the smooth side is the south and the other side is the north. From the direction of leaf growth, the direction of leaf surface is generally south. From the perspective of tree rings, the side with a wide ring distance is the south where the sun is abundant and trees can grow well. It can also be distinguished by the moss of stones or roots. Moss likes to grow in wet places, that is, the back of the sun, and its opposite is the sunny south. If the trees are dense, the direction of the ant hole is generally south.
Why can perfume give off the smell of front, middle and back?
Different flowers contain spices that evaporate at different rates. It is generally believed that the front taste is the aroma emitted about 10 minutes after the perfume is rubbed; It takes 30 to 40 minutes for the intermediate taste to appear after rubbing, and it takes 30 minutes to 1 hour for the taste to smell.
Top flavors include: citral series such as lemon, orange and bergamot, and flower series such as lavender, Yilan and orange blossom; In the middle stage, there are: jasmine, rose, lily of the valley, clove and other flower series, as well as rosin, cinnamon and other spice series; The aftertaste is sandalwood, oak and other series, as well as animal perfumes such as musk and amber.
Do figs really bear fruit without flowering?
Figs are blooming. Its flowers are on the total axis, and the top of the total floral axis is sunken downwards, and it grows into a fleshy hollow ball with an unsealed hole at the top. Cut the ball open with a knife, and many Xiao Xiong flowers can be seen at the upper end of the cavity periphery, and there are small female flowers at the lower end. Figs are pollinated by insect vectors. During the flowering season, a bug drills through a small hole to help it pollinate.
Why do you seldom see black and brown flowers?
One of the main functions of colorful flowers in plants is to attract pollinators. Of course, there are also some flowers with unusual colors, such as green and black. In Guangdong, Guangxi and Yunnan, there is a plant called Huxucao with black flowers.
What plants are about to disappear in China?
There are 8 species of national first-class protected plants in China: Ginkgo biloba, Alsophila spinulosa, Davidia involucrata, Metasequoia glyptostroboides, Ginseng, Cynanchum bungeanum and Camellia.
Why does epiphyllum only bloom for a while?
Epiphyllum is a kind of cactus, which is native to dry and hot areas of Mexico and has developed the habit of drought tolerance. Epiphyllum blooms at night to avoid the exposure of tropical sunlight, and the flowering time is short, also to reduce water evaporation. So it is a flash in the pan. This is actually an adaptation of Epiphyllum to its long-term living environment.
Will vines tie trees to death?
Yes Because vines grow very fast, as long as you climb around the tree, you will soon wrap the trunk tightly. As the trunk grows longer and thicker, the vines will become tighter and tighter, and the road for transporting nutrients in the trunk will be blocked. The lush leaves of vines also affect the growth of trees, and slowly the trees will die.
Why are the leaves of plantain seeds arranged in a spiral shape?
Plantago seeds are short, almost close to the ground, and are easily blocked by taller plants. But plantain seeds have a clever way to win sunlight. Its leaves are arranged in a spiral.
Why eat pineapple dipped in salt water?
Because pineapple pulp is rich in sugar, vitamin C, citric acid, malic acid and other organic acids, when eaten raw without dipping in salt water, there will be a tingling sensation in the mouth, which is because pineapple acid is at work. Because this acid can decompose protein, it will have a stinging effect on oral mucosa. After pineapple is soaked in salt water, it can inhibit the effect of pineapple acid and make pineapple taste sweeter.
Can you be poisoned by eating rotten food?
Not necessarily, because the "bacteria" that cause food poisoning and the "bacteria" that make food rot are two different "bacteria". Eating rotten things does not necessarily lead to food poisoning. Only rotten things contain "food poisoning bacteria" can cause food poisoning.
Why is the pool water green?
As long as you look carefully, you will find that there are many strange, green and bright seaweed plants hidden in the pool water, which are the ones that dye the pool water green.
Why do spring radishes have chaff?
When radish is sown in autumn, a large amount of nutrients must be stored in the roots so that the nutrients can be used for bolting and flowering in the next spring, and the sugar in the roots is consumed in large quantities. At this time, the cellulose increases rapidly and the radish will become dry and tasteless. Therefore, the radish in spring will chaff.
Why does sunflower turn to the sun?
The tropism of plants can be divided into phototropism, geotropism and tactile sensation. Sunflower sunlight is a typical phototropism. Under the irradiation of sunlight, the auxin content on the back of sunflower increases, which stimulates the cells on the back to elongate, thus slowly rotating towards the sun. After the sun goes down, auxin is redistributed, and the sunflower slowly turns back to its original position, that is, the east. However, once the disc is in full bloom, it no longer turns to the sun, but is fixed in the east.
Why are yellow pine trees so strange?
Anyone who swims in Huangshan Mountain will be deeply impressed by the welcoming pine there. The peculiar growth of Pinus taiwanensis is caused by the environment there. In the mountainous area, the mountain wind roared day and night and blew down from the top of the mountain. In order to survive, the pine trees on the mountain have to change their tree shapes, some become flags, and some grow into umbrellas. Huangshan Mountain is mostly bare rocks, and even if there is soil, it is barren. In places where water and nutrients are scarce, Pinus taiwanensis has to grow roots that are intertwined and dense as cobwebs to stop the rain that tries to slip away. The trunk is shorter and the leaves are thinner and shorter. Adding a thick layer of wax to the leaves can reduce the evaporation of water. After years of tossing, Pinus taiwanensis survived in the harsh environment, but left traces of time on the tree.
Why can fruit sober up?
Excessive drinking is often a sign of drunkenness. There are many signs of drunkenness, many languages, ineffective tongue, fever and numbness in cheeks, and dizziness. It is a harbinger of drunkenness, and you need to wake up at this time. Eating some sour fruit or drinking 1-2 clean vinegar can relieve hangover. This is because fruits contain organic acids, for example, apples contain malic acid, oranges contain citric acid, and grapes contain tartaric acid. The main component of wine is ethanol, and organic acids can interact with ethanol to form esters to achieve the purpose of hangover.
Why can't tofu and spinach be cooked together?
Spinach is rich in nutrition and is known as the "king of vegetables", but it contains a lot of oxalic acid, which is about 300 mg per 100 g of spinach. Tofu contains more calcium. If both enter the human body at the same time, chemical changes can occur in the human body, resulting in insoluble calcium oxalate. Stones in the human body are deposited by insoluble calcium salts such as calcium oxalate and calcium carbonate, so spinach and tofu should not be eaten together.
Why is it best to eat tofu with kelp?
Bean products, such as bean curd, are really nutritious and cheap, and they are good foods to supplement high-quality protein, lecithin, linoleic acid, vitamin B 1, vitamin E, calcium and iron. Tofu also contains a variety of saponins, which can prevent the production of lipid peroxide, inhibit fat absorption and promote fat decomposition. However, saponin can promote the excretion of iodine and easily cause iodine deficiency. Therefore, people who often eat tofu should appropriately increase their iodine intake. Generally speaking, as long as you insist on eating iodized salt. Kelp is rich in iodine, so it is very reasonable to eat tofu with kelp.
Why do onions have white and green parts?
Any plant that grows in a place without light will not be green. When planting onions, cover more soil around the long leaves of onions, and the part buried in the soil will turn into onions because of the lack of light. On the other hand, the leaves in the upper part of the soil can see sunlight and are green, so onions have two parts: white and green.
Why do flowers smell?
Because flowers contain oil cells that can continuously secrete aromatic oil. Aromatic oil is easy to volatilize, especially during the day, when flowers are heated by the sun, they will emit fragrance.
Why do flowers have all kinds of colors?
Most flowers are between red, purple and blue. Is this because there is a chameleon in the petals? Anthocyanin. Anthocyanins can change different colors according to the pH of the soil and the temperature of the surrounding environment. The color of some flowers can change between yellow, orange and red, because anthocyanins in flower cells are at work.
When those red berries come in spring, what kind of plants are red beans?
Southerners are used to calling acacia, acacia and sea red beans red beans. The red bean in the poem is a symbol of love between people. Among them, Acacia loves young men and women and is often used as a token of loyalty, which conforms to poetry, so Acacia is a red bean written by a poet.
How did the name "lithophyte" come from?
There is a plant that looks like a flower on a stone. It is a plant of Apricot family. Because its color, appearance and markings are like pebbles, it is named "lithophyte".
Why is it stuffy in the cabbage cellar?
Because Chinese cabbage should also breathe like human beings, and breathe in oxygen and exhale carbon dioxide. When you put it in the vegetable cellar, it will still breathe. After a long time, the cellar is not often ventilated, and it is full of carbon dioxide. Because carbon dioxide will suffocate people, people will suffocate in the vegetable cellar.
Why don't orchids shed their leaves in a hundred years?
The leaves of Centurium, which grows on the coast of Angola, are really evergreen and can live for hundreds of years. Osmunda japonica has a well-developed root system, which often sticks underground to absorb a lot of water and send it to the leaves. At night, dew formed by sea fog can keep leaves moist. Therefore, all the year round, Centurium leaves will not be short of water, and can maintain vigorous vitality.
Why is corn sweet?
Corn is sweet because there are recessive genes on the chromosome of corn endosperm. However, recessive genes will hinder the conversion of sucrose to starch in grains, reduce starch and increase sugar content. In this way, the corn will be very sweet.
Why do fruit trees sometimes bloom twice a year?
Most fruit trees bloom in spring and mature in summer and autumn. But some fruit trees will bloom once in autumn. This is because of abnormal climate or diseases and insect pests. There is much rain and high temperature in autumn, and the dormant flower buds will wake up and bloom in advance. In autumn, there are pests in the orchard, and a large number of leaves fall off, which will also wake the sleeping buds.
Why does bamboo die after flowering?
Bamboo blooms because it has exhausted the nutrients in the soil, indicating that its life is running out. After flowering, most kinds of bamboo will die. Therefore, the flowering of bamboo is an elegy of life, and bamboo hopes to bear its own fruit at the last moment of life and recreate a green bamboo forest.
Why is pigeon tree famous at home and abroad?
Davidia involucrata, also known as Davidia involucrata, is a famous "living fossil" in the plant world. It was discovered all over the world millions of years ago. Later, the earth's climate became cold, snow and ice covered the earth, and Davidia involucrata almost froze to death. Davidia involucrata was discovered and introduced from all over the world, and now Davidia involucrata has spread all over Europe.
How does Sophora alopecuroides pollinate?
The male plant of Sophora alopecuroides pulls out spikes in water, and there are many bracts outside the spikes. When the male flower matures, the bracts automatically leave floral axis, surface and drift with the water. At this time, the flower stalk of the female plant is rapidly elongated, and the female flower is sent out of the water to open. Female flowers and male flowers meet on the water, and they pollinate as soon as the stigma and stamen touch. Then the female flower closes, the flower stalk curls, and shrinks into the water to breed fruit.
Why do Cycas bloom so little?
Cycas cycas, also known as cycas, were everywhere on the earth during the dinosaur era. Later, the earth's climate became cold, and Cycas only survived in the tropics. Most of China is in temperate zone, and Cycas, as an ornamental plant, grows short. Because of the low temperature, flowers often don't bloom for many years. Occasionally, Cycas bloom, which makes people feel rare.
Why can Snow Lotus bloom on the snow-capped mountains?
If the seed selection is not good, the harvest will be poor or even no harvest. Therefore, farmers always choose those big and full seeds when choosing seeds.
Why can the Millennium lotus blossom?
Ancient lotus seeds have a hard shell, which can completely prevent the infiltration or leakage of water and air; There is a small hole in the ancient lotus seed to store oxygen, carbon dioxide and nitrogen; Ancient lotus seeds also contain a small amount of water and are nutritious. These characteristics of ancient lotus seeds make them have strong vitality.
Why are angiosperms more advanced than gymnosperms?
Angiosperms and gymnosperms are both seed plants. The ovule and seed of gymnosperms are naked, and there is no ovary outside the ovule and no pericarp outside the seed. Angiosperms have real flowers. After fertilization, the ovule develops and grows in the ovary, and the seed is wrapped by pericarp. Therefore, angiosperms can be better protected in the process of reproduction and have stronger ability to adapt to the environment. So angiosperms are more advanced than gymnosperms.
How big can the fruit grow?
When the fruit is ripe, it is many times larger than the ovary. The biggest fruits come from artificially cultivated plants. The pumpkin cultivated by a family in Indiana, USA, weighs 233 kilograms.
Why does meat become bright, sweet and juicy when it matures?
When meat and fruit are about to ripen, many complicated changes will take place. The blue-green fruit turns into Huang Chengcheng and red; Hard and sour pulp will become fragrant, sweet, tender and juicy.
Why do fruits fall when they are ripe?
After the fruit is ripe, if it is not picked in time, the metropolis will fall off on its own, not because the fruit handle is too thin to bear the heavy burden of the fruit, but because the fruit must fall to the ground before it can sprout and take root and grow new fruit trees. In order to breed offspring, when the fruit matures, the cells on the fruit stalk begin to age, forming a so-called "abscission layer" at the junction of the fruit stalk and branches. The abscission layer is like a barrier, which blocks the nutritional supply of fruit trees to fruits. In this way, due to gravity, fruits fall to the ground one by one.
How do plants sow with the help of wind?
The seeds of some plants are small in size and light in weight, and can be floated far away with the wind; Some seeds have flat wings, fly out of the cracked shell after maturity and fly to other places to take root and grow; Some seeds have a bunch of soft thorns or hairs on their heads. When the fruit is ripe, it will fly to settle in various places as soon as the wind blows. When some seeds mature, the stems will separate from the roots, roll along the ground in the wind, and sow all the way.