Why do flowers have black ones

Question 1: Why are some flowers black? Black flowers are extremely rare in nature. Scientists have counted more than 4,000 kinds of flowers and found that only 8 kinds are black, so black flowers are often particularly valuable. What is the reason? The mystery must start with sunshine. Sunlight consists of seven colors of light, which have different wavelengths and different heat. Flower tissues, especially petals, are generally tender and vulnerable to high temperature.

There are many red, orange and yellow flowers in nature. They can reflect red, orange and yellow with more heat in the sun, so as not to cause burns and have the function of self-protection. Black flowers can absorb all light waves, and the temperature rises rapidly in the sun, so the tissues of flowers are easily injured. Therefore, after a long period of natural elimination, there are few black flower varieties left.

The different colors of flowers are mainly due to the different components (pigments) of compounds contained in petals. These compounds can be roughly divided into two categories, namely, flower I and carotene. Anthocyanin is extremely unstable, red when acidic, blue when alkaline and purple when neutral. The strength of pH also directly affects the depth of color. Carotene can make flowers appear yellow, orange, red and other colors. There are many kinds of carotene, and more than 80 kinds are known at present. There are many kinds of plants in nature, and their living environments are also different. Under the action of two pigments, plants can produce colorful flowers.

There are few green flowers in nature, because the main pigment that forms green is chlorophyll, which generally exists in the stem and leaf tissues of plants, and there are few petals, but green flowers still exist. For example, hydrangea, whose flowers are mostly spherical white, will turn blue-green or pink in the later stage. A rose native to China, with large green flowers, is a variety of Chinese rose. There are many kinds of non-ornamental plants, such as rice, millet and onion, whose flowers are green.

Question 2: Why are there black flowers? We see some flowers are black, but in fact they are not really black.

As we know, sunlight is composed of seven colors, and its heat content varies with the length of light waves.

-Red, orange and yellow are long-wave lights containing a lot of heat; Cyan, blue and purple are short-wave light and contain less heat.

All kinds of flowers, especially petals, are tender and easily affected by high temperature, so they generally absorb less heat from blue-violet light and reflect red-orange light; That's why there are more red, orange and yellow colors. If you absorb more heat from red and orange light, it is easy to get high temperature, which is why there are fewer blue and purple flowers. Of course, if all the seven-color light waves are absorbed, the damage will be greater and it will be difficult to survive;

In addition, the rarity of black flowers may also be related to insects. Black flowers are hard to attract insects, so they are gradually eliminated by natural selection. This is why there are few black flowers.

Black Datura, Queen of the Night, Black Peony, Black Rose, Black Lily, Tiger Beard, Black Iris, Black Snow Lotus, Black Lotus and Chrysanthemum.

They are very mysterious flowers, but they are not really black. They are only purple or blue in nature, but they are also very precious. You can go and see it sometime. How beautiful! ! !

^_^! ! !

Question 3: Why are there no black flowers? Why are black flowers rare? Why are black flowers rare? Background: Nature is complicated, and there are all kinds of exotic flowers and herbs in the huge plant kingdom. Every spring, all kinds of flowers are in full bloom, competing with each other and decorating nature for people to enjoy. However, black flowers are rarely seen among colorful flowers. After long-term observation and experiment, relevant experts finally figured out the reason. Objective: Objective We use most data and a few experiments of black flowers to explain the reasons for the scarcity of black flowers. Process: process 1. By searching for information, we can explain why black flowers are so rare, mainly in the following aspects: 1 The original sunlight is composed of seven kinds of light: red, orange, yellow, green, blue, indigo and purple. They have different wavelengths and contain different amounts of heat. As we all know, flower tissues, especially petals, are generally tender and vulnerable to high temperature. There are many red, orange and yellow flowers in nature, because they can reflect more red, orange and yellow light in the sun without causing burns. Black flowers can absorb all light waves, so the temperature rises quickly in the sun, and their flower tissues are easily burned. Therefore, in the long-term evolution process, after natural selection, there are fewer and fewer varieties of black flowers, and there are few left. Experts counted more than 4,000 kinds of flowers and found that only 8 kinds of flowers were black. There are so few black flowers in the plant world that black flowers are regarded as precious varieties by gardeners and become treasures in flowers. The color of flowers mainly depends on carotenoids and anthocyanins contained in flower cells. Black flowers are rare, and besides the pigment of flowers, they also have a lot to do with sunlight. Flowers are tender and susceptible to high temperature, so they generally absorb less heat from blue-violet light and reflect red-orange light; If you absorb more heat from red and orange light, it is easy to get high temperature, which is why there are fewer blue and purple flowers. If a flower absorbs all the seven-color light waves, it will suffer more damage, so it is difficult to survive, so that is why there are few black flowers. All parts of flowers, especially petals, are immature, unlike stems and leaves with special protective structures such as cork layer and wax layer, so they are easily damaged by high temperature. Therefore, they generally absorb blue-violet light with less heat and reflect red-orange light, which is also the reason why there are more red, orange and yellow flowers. If flowers absorb more heat from red and orange light and reflect blue and purple light, they are easily affected by high temperature, which is why there are fewer blue and purple flowers. If the flowers all absorb seven-color light waves, they should be pure black flowers; Once this happens, the flowers will be seriously hurt and it will be difficult to survive. Therefore, one of the few black flowers in nature grows in a dark, humid and low-temperature environment all the year round. There are black flowers in the world, but there are also black flowers in nature, such as black tulip, black peony and black chrysanthemum. According to the statistics of more than 4000 kinds of flowers, only 8 kinds of flowers are black. There are so few black flowers in the plant world that black flowers are regarded as precious varieties by gardeners and become treasures in flowers.

I hope the landlord will adopt it

Question 4: Why are there no black flowers? Why are there no black flowers? There are also black flowers in nature, such as black peony and chrysanthemum. Because there are few black flowers, things are rare, and black peony and black chrysanthemum have become treasures. In addition to black flowers, there are many other colors of flowers, colorful and decorated with nature. Why are there so few black flowers? There are generally two substances in petals, one is anthocyanin and the other is carotene. Anthocyanins are unstable in nature, red in acid, blue in alkali, blue-black in strong alkaline substances and purple in neutral. Some flowers are yellow, orange and red. Their petals contain carotene. The color of flowers is related to the substances contained in petals, which cannot produce black factors in plants. Only under special circumstances will there be a black trend, so black flowers are very rare, and pure black flowers do not exist. This is the physiological factor of less black flowers. But why doesn't nature let plants have black factors? Mainly because of sunlight, if the flowers are black, they will absorb all wavelengths of energy from sunlight and are easily burned by strong sunlight, so natural selection determines that there are few black flowers.

Question 5: Why are there no black flowers in the world? Black flowers in nature are extremely rare. Scientists counted 4000 kinds of flowers and found that only 8 kinds of flowers were close to black. Therefore, dark flowers are often particularly valuable, and black chrysanthemums and black peonies have become the treasures of flowers. We explore why there are few black flowers through an experiment. Take three square plastic boxes, and the inner walls of the plastic boxes are filled with foam plastic. Add water to the plastic box, and put the plastic box filled with water into the freezer of the refrigerator. When the water in the plastic box is completely frozen, take out the plastic box and make a small hole in the bottom of the plastic box. Take three pieces of black, yellow and white paper and cover them on the ice; Take three empty glass cups, put plastic boxes on the glass mouths respectively, and hold the water in the boxes. Observe the melting speed of the ice in the plastic box in the sun. Soon you will find that ice melts fastest in plastic boxes covered with black paper; The second is a plastic box covered with yellow paper, and the slowest melting is an ice box covered with white paper. Sunlight is composed of many colors of light, with different wavelengths and different heat energy. Black can absorb all the light energy in the sun, so it absorbs the most heat energy under the same conditions. On the other hand, white reflects all the light waves in the sun and absorbs the least heat energy. Yellow can reflect the yellow light with more heat energy in the sun, so the temperature rise rate is slower than that of black. After long-term observation and research, scientists found that the seven colors of sunlight have different wavelengths, so they contain different amounts of heat. Flower tissues, especially petals, are generally tender and vulnerable to high temperature. Common red, orange and yellow flowers reflect red, orange and yellow light with more heat energy in the sun to avoid being burned, which has the function of self-protection. Black flowers can absorb all light waves, and the temperature rises rapidly in the sun, so the tissue of flowers is very fragile. So after a long period of natural elimination, there are few black varieties left.

Question 6: Why are the flowers not black and green? The color difference of flowers is mainly due to the different components (pigments) of compounds contained in petals. These compounds can be roughly divided into two categories, namely anthocyanins and carotene. Anthocyanin is extremely unstable, red when acidic, blue when alkaline and purple when neutral. The strength of pH also directly affects the depth of color. Carotene can make flowers appear yellow, orange, red and other colors. There are many kinds of carotene, and more than 80 kinds are known at present. There are many kinds of plants in nature, and their living environments are also different. Under the action of two pigments, plants can produce colorful flowers.

Green flowers are rare in nature, because the main pigment that forms green is chlorophyll, which generally exists in the stem and leaf tissues of plants, and there are few petals, but green flowers still exist. For example, hydrangea, whose flowers are mostly spherical white, will turn blue-green or pink in the later stage. A rose native to China, with large green flowers, is a variety of Chinese rose. There are many kinds of non-ornamental plants, such as rice, millet and onion, whose flowers are green. Of course, with the development of science and technology, human beings are also using genes, dyeing and other methods to artificially create green flowers, such as green roses.

Question 7: Are there any black flowers in the world? How are black flowers formed? Black Roman; Queen of the night; Black peony; Moju; Black rose;

It can be explained by the theory of biological evolution that black flowers will not cause insects to pollinate, cannot reproduce and naturally cannot survive.

Black flowers are extremely rare in nature. Scientists counted more than 4000 kinds of flowers and found that only 8 kinds were black. So black flowers are often particularly expensive. After long-term observation and research, scientists finally discovered the mystery. Sunlight consists of seven colors of light, which have different wavelengths and different heat. Flower tissues, especially petals, are generally tender and vulnerable to high temperature. There are many colors in nature, such as red, orange and yellow. They can reflect red, orange and yellow which contain a lot of heat in sunlight, so as not to cause burns, and have the function of self-protection. Black flowers can absorb all light waves, and the temperature rises rapidly in the sun, so the tissue of flowers is very fragile. Therefore, after a long period of natural elimination, there are few black flower varieties left.

Because they contain less bright pigments, they are actually not all black, and most of them are darker or purplish.