Botany is a serious basic course for agronomy majors, but living in the same environment as ours, for all kinds of plants around us, in the process of human social development, human exploration has gradually discovered the magical plant world. Up to now, various phenomena in the plant kingdom still need to be discovered and explored scientifically.
Through a semester's study of "mysterious botany", I learned a lot about the magic in the plant world, which is completely different from the animal world; The mystery of plant life, plant reproduction, plant prospecting, the growth characteristics of plants with different habits in various environments and so on.
The mystery of the plant world and the magical plants are the most attractive places for me in this course. Plants are changing our living environment and our human activities are also changing the growth of plants. Our mutual understanding has also improved this course, protecting the ecological environment and sustainable development education; With the development of modern biology, many scientists have cultivated various new plant varieties through unremitting efforts and made new contributions to the progress of science. For example, a color-changing plant Britain has cultivated a color-changing plant through genetic engineering. This plant will automatically turn blue when it is thirsty due to lack of water under the irradiation of ultraviolet rays; When you need fertilizer and feel hungry, it will appear yellow; It will automatically turn red if it is eroded by pests. People can take effective measures in time according to the color change of this plant. These are what scientists know about plants in the process of practice, and at the same time, they use the spirit of scientific exploration. A unique knowledge product. But the same unscientific transformation often makes plants hurt our lives. For example, the abuse of the breeding speed of "water hyacinth" not only failed to bring rich profits to our aquaculture industry, but also threatened our rivers and ecology.
It stands to reason that plants are afraid of fire and are good fuels when they are dry. However, some kinds of plants cannot be helped by fire.
Larch is a tree species that is not afraid of fire. Why can it be an "only child after robbery"? This is because the tall and straight trunk of larch is covered with a rough bark that contains almost no resin. This thick bark is difficult to burn through, and the fire can only burn to its epidermis, and the tissues inside will not be destroyed. Even if the trunk is burned, it can secrete a kind of brown transparent resin, which will wrap the wound on the body and then solidify, so that fungi, viruses and pests robbing fish in distress can enter seamlessly. Therefore, larch has become a great "hero tree" in the forest of fire.
There is a Schima superba tree in the forest in western Guangdong, China, and it is also a fire prevention expert, which can stop the fire from spreading. Its leaves contain as much as 45% moisture, and they burn without burning under fierce barbecue. Its leaves are dense, covering a large area, and there are no weeds growing under the trees, which can not only prevent the fire from spreading in the upper part of the tree crown, but also prevent the fire from spreading on the ground. So Schima superba is a rare fire tree.
It is not surprising that plants are not afraid of fire, but these species have gradually formed a self-protection ability in the long process of evolution. And "man-eating plants" are even more creepy. It is said that Madagascar is a sacred tree. /kloc-in the second half of the 0/9th century, some European explorers explored Africa. One of them, Carl Ritchie, returned to Europe and claimed to have seen a tree that could eat people with his own eyes in Madagascar. Local residents regard it as a "sacred tree". An indigenous woman was forced to climb the tree because she violated the tribal precepts, and several thorny leaves on the tree immediately wrapped her tightly. When the leaves reopened a few days later, there was only a pile of bones left inside. The second rumor: Java Island "eats people's willows". It is said that this strange tree grows in Java, Indonesia. Its shape is similar to weeping willow, with many long branches. Some branches are half suspended in the air, and some are dragged to the ground, just like a broken line. If pedestrians don't pay attention to these branches, they will immediately roll up and cling to people like countless ropes, making it difficult for people to get out. Then, the branches secrete a very viscous digestive juice and begin to digest the skin, fat and muscles of the human body until the nutrients in the human body absorb light.
The mystery of nature has yet to be discovered, and interest is the driving force for our discovery. Through the study of this course, I not only increased my knowledge of botany, but also became more interested in all kinds of magic and mysteries in plants.
2. Write a 500-word composition on the topic of plant growth. Once I started the experiment of "Soybean Growth Process".
I'll prepare transparent plastic cups, dirt, paper towels and soybean seeds first. Then spread paper towels around the cup and put more than half of the soil in the cup. Then, I put some seeds between the cup and the tissue. Finally, I crushed a small part of the remaining mud and put it in a cup (the seeds are about one centimeter deep from the surface), and poured some water to make the paper towel completely wet. So the seeds were planted.
A few days later. I came to the windowsill to observe the seeds. I found the color of the seeds changed a little. Originally, the color of the seed was big yellow, but after these days, the appearance of the seed was a little light and it felt a little transparent. The seeds are particularly full and the seed coat is a little cracked.
Two days have passed. I went to the windowsill again to observe the seeds. I looked into the cup. To my surprise, the seeds germinated. The shell of the seed cracked. Buds are drilled from the inside, and the color of buds is light yellow with a little cyan. The top of the bud is pointed and looks very tender. This is the bud head. The bud head grows downward. There is a question in my mind: why does the bud of a seed grow down? Isn't this impossible to drill out? I thought about it and watered it.
The next day, I came to the window platform again to observe the seeds. Through my observation. Seeds change greatly now and when they germinate. When it germinated, the seed shell just broke, and now most of it has fallen off. I really want to help it peel off all the shells. The real small leaf bud in the seed has left its original position and is close to the outside. Two trees emerged from the soil. Originally it was closed, but now it is scattered, with a small bud in the middle. I also found that each bud has two leaves, which look furry like a love shape.
A few days later, I came to the windowsill again. There were many small green bean sprouts in the cup. I also found that its leaves are two opposite pieces.
Now we know why the new bud of this seed grows downward. That's because it's not a bud, but a root, so it should grow down.
When I came to the windowsill again to observe, the soybean had changed from a seed to a bean sprout, and then it grew up slowly from the bean sprout. . Now there is a soybean seedling wrapped around security window to help him grow. This soybean seedling is also the fastest growing one.
Although growing soybeans is small, it is a good start for me to experience plant growth.
3. Bamboo is a common plant. Although its branches are not very thick, they have good toughness and keep folding.
Therefore, bamboo has been loved by people since ancient times. Some people praise bamboo as "an enlightened bamboo like Qian Qian"; Others wrote a poem specially for bamboo, "Stick to the green hills and never relax ...", which shows the position of bamboo in people's minds.
Bamboo is very beautiful in appearance. One bamboo node after another, slender bamboo leaves, evergreen all year round, full of vitality, bring people a kind of beautiful enjoyment.
So bamboo is the work of many painters. Bamboo has many uses. Since ancient times, people like to make furniture with bamboo.
There are also those who make bamboo rafts, chopsticks, chairs, tables, writing brushes and toothpicks … countless. There are many things made of bamboo among the ethnic minorities in Yunnan, China. There is a house, a bed, a reed, a cup, and a bamboo mat ... Bamboo can be used not only for furniture, but also for musical instruments. There are bamboo flute, sheng, cucurbit silk … There are many kinds of bamboo, including bamboo, bamboo, bamboo, bamboo, bamboo … all kinds.
Bamboo likes living in the south. It doesn't need fertile land. Where mountains and rivers have soil, they can thrive.
There is no need to water, fertilize and weed. Bamboo grows very fast and can be used in less than one year, so bamboo is a good cash crop. Bamboo shoots are also a delicious and nutritious vegetable.
During the Chinese New Year, people always forget to have a plate of fried bamboo shoots with meat. Bamboo is also a good material for paper making.
Bamboo is full of treasures, and it is a valuable plant. It has tenacious vitality, beautiful appearance and very fast growth. When bamboo was young, it was generated in the soil by strong will, ready to rush out of the hard ground at one time.
I like the beautiful appearance of bamboo, and I admire its tenacious vitality and rapid growth. Panda This time, I saw a panda in the zoo. Panda is really a very beautiful and lovely animal.
Its living habits make people laugh. Let me introduce the panda, the national treasure of our motherland.
Pandas are very popular, but they are on the verge of extinction in this world. Pandas are rare animals, so we should take good care of them. It has short limbs, slow movements, only black and white body, and a pair of shiny black eyes embedded in its furry face, which is very cute.
Pandas live a leisurely life. It likes to take a leisurely walk and play on the flat ground.
Sometimes it looks up at us, wondering why we should look at it, and sometimes it sits on the grass with its head down, as if it had met something sad and angry, which makes people puzzled! When it is happy, it somersaults on the grass, just like a big ball rolling around on the ground. Seeing this scene really makes people laugh. Panda is lazy, too.
When the panda sleeps, its abdomen faces the sky. Sometimes, it will pat its stomach gently with its front paws. Sometimes, when he kicks his feet, he turns over. I thought he was getting up! Unexpectedly fell asleep again. He turned over, rubbed his sleepy eyes with his hand, looked at people curiously, staggered to the other side of the railing and sat down, as if to clear his head.
Unexpectedly, it lay down and fell asleep again. Alas, pandas can really sleep! Pandas are also very hygienic. After eating, he should squat down by the pool, lean his hands against the pool, lower his head, drink water and moisten his throat. Look at its appearance, it really makes people laugh! Panda is a treasure in the world, and its every move adds infinite interest to thousands of tourists.
4. Write a composition about the growth process of plants and observe the composition of plants.
Today, our team observed many plants, and they were very careful!
The first plant I observed was like green onion. Half is red, and the lower half is green. I am surprised that there is a yellow thing with a black spot between the two leaves connected with it. What is that? I think it may be where other leaves grow!
The second plant is a green cactus. It grows a small cactus on the cactus. This kind of cactus is unusual. It shrinks when touched, and then slowly recovers, just like a coward.
The third plant is a kind of grass. It looks like a tree. The edges of the leaves are white and prickly, and the center of the leaves is green. This grass hurts me. The autumn wind blew slightly outside the window, and the grass swayed with the wind, as if waving to me.
5. A composition of 1000 words describing three kinds of creatures. The first part: fairy mountain Lake, a beautiful place, is famous throughout northern Zhejiang.
We came to the dock, where there were a sea of people and tourists, and many people were quietly waiting for the boat. We also sat down and began to wait for the boat. After a while, the boat came, we got on the boat and started our trip to Xianshan Lake.
We first came to the waterfowl watching area, and two orioles were singing. Then, a line of egrets flew by, just like the poet Du Fu's "two orioles singing green willows, and a line of egrets went up to the sky." Suddenly I saw a duck standing motionless in the middle of the lake and asked the tour guide, "Aunt, what kind of duck is this?" The tour guide smiled and said, "Little friend, this is not a duck, but a kind of chicken. Land, water and air are omnipotent, and they are called bamboo chickens.
On the 60th anniversary of the National Day, they lined up neatly, as if they were also participating in the military parade. "Hearing this, I can't help thinking: My knowledge is too shallow.
We came to the reeds, where there were all kinds of reeds. There are many kinds of reeds, I can't see them all. Kakai reed, variant long reed, Japanese reed, climbing reed, silk reed ... The most famous one is water reed. When you see tall reed stems and slender leaves, you will feel good. It fluttered gently in the sun. How can you be in a bad mood? Finally, we came to the foot of fairy mountain, and the tour guide told us a famous saying: "If the mountain is not high, there must be a fairy, and if the water is not deep, there must be a dragon."
Both fairy mountain and Fairy Lake have such characteristics: the Tibetan King Bodhisattva lived in fairy mountain, and Guanyin Bodhisattva also left footprints here. Fairy mountain Lake-a paradise for creatures, I will never forget it! Teacher's comment: The article tells the story of a young author traveling with a group to Xianshan Lake. The little author introduced the process of playing in detail, including many wonderful plots.
For example, the author mistakenly thinks that bamboo chicken is a duck, and his writing is vivid, which makes readers feel good and gains some knowledge. In addition, the author also introduces the reeds in Xianshan Lake, so that readers can know that there are so many kinds of reeds, which is really informative.
The full text is clear, the paragraphs are natural and the center is clear. The little author wrote this article very well, vividly showing the characteristics of the scenery of Xianshan Lake. "There are so many kinds of reeds that I can't open my eyes" was changed to "I can't open my eyes".
When I first saw this word, I felt that biodiversity was far away from us, but in fact, biodiversity is everywhere in our lives. Giant panda, Davidia involucrata and alligator sinensis are all endemic animals and plants in China. China is also one of the 12 countries with the richest biodiversity on earth.
This shows how important biodiversity is to us. But we will face an urgent problem, protecting biodiversity.
Biodiversity is one of the most remarkable features of the earth and the foundation for the survival and development of human society. However, the distribution of biodiversity in the world is uneven. Some creatures are only distributed in a certain area, for example, beluga whales are only distributed in the main stream and estuary of the Yangtze River; Beaked lizards are only distributed in New Zealand and some nearby islands, penguins are distributed near Antarctica, and a few can extend to Africa and southern South America. Golden monkey, a special product in China, is only distributed in southern Sichuan, Shaanxi and Gansu and Shennongjia mountain area in Hubei. Giant pandas are only distributed in northwestern Sichuan, southern Gansu and the southern foot of Qinling Mountains in Shaanxi, and live in coniferous forests and coniferous and broad-leaved mixed forests of 2000 m-3500 m ..
At present, the world is facing five crises of population, resources, environment, food and energy, and the solution of these crises is closely related to the biodiversity on the earth. Many developed countries not only exploit their own resources, but also plunder the resources of developing countries by virtue of their strong economic strength and advanced science and technology. Due to population expansion and economic pressure, developing countries lack awareness of biodiversity conservation, resulting in the loss of many biodiversity.
The giant panda is the national treasure of our country, and its naive appearance can be described as everyone loves it. However, the giant panda is in danger of extinction.
Many animals are endangered. Maintaining biodiversity is the responsibility of each of us, and protecting biodiversity means protecting the earth! Chapter 3: About biology students, you know that people's age passes year by year, but do you know how the biological age increases? In fact, the growth of living things is the same as that of us humans.
As long as we observe carefully in life, there are many examples around us. If you visit the park and see the stump left by a fallen tree, you may walk around it excitedly, and you may rest on it, but do you know its age? Don't waste time looking for it in a sea of information. Bend down and you will find many circles on it. These circles represent their ages. A circle represents their age of one year. How many laps show how old they have grown. It's amazing! If you have a beautiful fish, you will love it. When you let it go in a hurry, will you pay attention to its age? You must admit that you didn't pay attention, didn't you? You may struggle to find information again. To tell the truth, it is easy to know the age of a fish by carefully observing its scales, because there are ripples on the scales.
Chapter 4: Biodiversity refers to a stable ecological complex formed by the regular combination of various organisms (animals, plants and microorganisms) within a certain range. This diversity includes the species diversity of animals, plants and microorganisms, the genetic and variation diversity of species and the diversity of ecosystems.
Among them, species diversity is the key to biodiversity, which not only reflects the complex relationship between biology and environment, but also reflects the richness of biological resources. At present, we know that there are about 2 million species, and the forms of these species constitute the diversity of biological species.
Biodiversity is the sum of organisms and their ecological complexes with the environment and various ecological processes related to them, which is composed of genetic diversity and biology.
Botany is a serious basic course for agronomy majors, but living in the same environment as ours, human exploration has gradually discovered the magical plant world in the development of human society. Up to now, various phenomena in the plant kingdom still need to be discovered and explored scientifically.
Through a semester's study of "mysterious botany", I learned a lot about the magic in the plant world, which is completely different from the animal world; The mystery of plant life, plant reproduction, plant prospecting, the growth characteristics of plants with different habits in various environments and so on.
The mystery of the plant world and the magical plants are the most attractive places for me in this course. Plants are changing our living environment and our human activities are also changing the growth of plants. Our mutual understanding has also improved this course, protecting the ecological environment and sustainable development education; With the development of modern biology, many scientists have cultivated various new plant varieties through unremitting efforts and made new contributions to the progress of science. For example, Britain has cultivated a color-changing plant through genetic engineering. This plant will automatically turn blue when it is thirsty due to lack of water under the irradiation of ultraviolet rays; When you need fertilizer and feel hungry, it will appear yellow; When it is eroded by pests, it will automatically turn red. People can take effective measures in time according to the color change of this plant. These are what scientists know about plants in practice, and they also use the spirit of scientific exploration. A unique knowledge product. But the same unscientific transformation often makes plants ruin our lives. For example, the abuse of the breeding speed of "water hyacinth" not only did not bring rich profits to our aquaculture industry, but also threatened our rivers and ecology.
It is natural that plants are afraid of fire. When they are dry, they are all good fuels. However, some kinds of plants cannot be helped by fire.
Larch is a tree species that is not afraid of fire. Why can it be an "only child after robbery"? This is because the tall and straight trunk of larch is covered with a rough bark that contains almost no resin. This thick bark is difficult to burn through, and the fire can only burn to its epidermis, and the tissues inside will not be destroyed. Even if the trunk is burned, it can secrete a kind of brown transparent resin, wrap the wound on it, and then solidify it, so that the fungi, viruses and pests robbed in the fire can enter seamlessly. Therefore, Larix gmelinii has become a forest of fire.
There is a Schima superba tree in the forest in western Guangdong, China, and it is also a fire prevention expert, which can prevent the fire from spreading. Its leaves contain up to 45% water and will not burn under intense barbecue. Its leaves are dense, covering a large area, and there are no weeds growing under the tree, which can prevent the fire in the upper part of the crown from spreading and the flame on the ground from spreading. So Schima superba is a rare fire-resistant tree species.
7. To write a short article about animals, plants or observing the growth process of plants, you must write about the growth process of soybeans. Once I started the experiment of "Soybean Growth Process".
I'll prepare transparent plastic cups, dirt, paper towels and soybean seeds first. Then spread paper towels around the cup and put more than half of the soil in the cup. Then, I put some seeds between the cup and the tissue.
Finally, I crushed a small part of the remaining mud and put it in a cup (the seeds are about one centimeter deep from the surface), and poured some water to make the paper towel completely wet. So the seeds were planted.
A few days later. I came to the windowsill to observe the seeds.
I found the color of the seeds changed a little. Originally, the color of the seed was big yellow, but after these days, the appearance of the seed was a little light and it felt a little transparent. The seeds are particularly full and the seed coat is a little cracked.
Two days have passed. I went to the windowsill again to observe the seeds.
I looked into the cup. To my surprise, the seeds germinated.
The shell of the seed cracked. Buds are drilled from the inside, and the color of buds is light yellow with a little cyan.
The top of the bud is pointed and looks very tender. This is the bud head. The bud head grows downward.
There is a question in my mind: why does the bud of a seed grow down? Isn't this impossible to drill out? I thought about it and watered it. The next day, I came to the window platform again to observe the seeds.
Through my observation. Seeds change greatly now and when they germinate.
When it germinated, the seed shell just broke, and now most of it has fallen off. I really want to help it peel off all the shells.
The real small leaf bud in the seed has left its original position and is close to the outside. Two trees emerged from the soil. Originally it was closed, but now it is scattered, with a small bud in the middle. I also found that each bud has two leaves, which look furry like a love shape.
A few days later, I came to the windowsill again. There were many small green bean sprouts in the cup. I also found that its leaves are two opposite pieces.
Now we know why the new bud of this seed grows downward. That's because it's not a bud, but a root, so it should grow down.
When I came to the windowsill again to observe, the soybean had changed from a seed to a bean sprout, and then it grew up slowly from the bean sprout.
Now there is a soybean seedling wrapped around the safety window to help it grow. This soybean seedling is also the fastest growing one. Although growing soybeans is small, it is a good start for me to experience plant growth.
8. Are there any common creatures in the community? All animals and plants can be used, such as camphor tree, terrestrial, moss, terrestrial, sparrows and birds living in a dark and humid environment, shrike birds and birds living in trees or bushes, goldfish watching in trees or bushes, underwater sound, snails living in pools, terrestrial, bees and insects living in a dark and humid environment, mosquitoes and insects living in places rich in flowering plants. Living in a damp and dark place, oleander, terrestrial plants, sunny and fertile soil, is it enough for rats, women and terrestrial insects to live in a dark and wet environment? Check the biology book in high school. There is a chapter on the food chain, which talks about the living environment and living conditions of many animals and plants. I remember the most specific one is taking a pond as an example. It is a method and equipment to adjust and improve the growth and living conditions of human beings, animals, plants and microorganisms by using simulated biological spectrum signals generated by simulation.
The simulated biological spectrum signal is generated by exciting one or more chemical elements and their compounds with some form of energy (such as thermal energy or magnetic energy) in the simulated biological spectrum generator, and the simulated biological spectrum signal is a broadband signal from micron to millimeter. When this signal acts on a specific part of an organism, the energy levels of atoms, molecules and electrons in the organism can jump and resonate, thus achieving the purpose of regulating and improving the growth state of the organism.
The 9.400-word composition describes the growing environment of plants, which is ordinary and small, but has indomitable vitality; Although not beautiful, it has strong vitality; All this is the power of longing for life! Grass, regardless of lightning, regardless of storm, regardless of cold and heat, is not afraid. All this is the power of faith. The grass is eager for life and survival, so it stands up again! I walked along the path, looking at the green grass on the roadside, lost in thought ... Perhaps, many people regard grass as a symbol of weakness and think that their short bodies can't stand a little wind and rain. But I don't think so, because in my eyes, grass is so tenacious and full of vitality, and the most important thing is their own vitality and spirit! As soon as spring comes, the grass opens its dim eyes and rushes out of the ground to share the joy and warmth brought by the spring girl with people. They are scattered all over the earth, laying a green carpet for the "Mother Earth" who raised them ... This combination of thousands of grasses in Qian Qian makes people see the greatness of life. Of course, the respect of the grass is not only here. They still shine with a bright spot-indomitable spirit. Although grass is not as tall and straight as towering trees, nor as bright red and beautiful as flowers, their spirit is enough to overwhelm all this, which makes people re-recognize and marvel. In the storm, tall and straight trees were uprooted and colorful flowers were destroyed, but the grass won with a force stronger than material strength ... After the storm, all the flowers and trees changed, only the grass still stood there with its head held high, enjoying the sunshine after the rain ... Because of this, they were worthy of the great poet's "wildfire never completely burned them down, and they were tall again in the spring breeze". I think: in the long journey of life, everyone will encounter bumps and bumps. As long as we have the spirit of grass, the clouds of despair will eventually disperse and hope.
10. The biological composition "500 words" tells how we should treat the environment on which we live. Nowadays, people's living standards are gradually improving, but people ignore the protection of ecological environment while making money, which makes people's awareness of environmental protection worse and worse today, and they don't pay attention to the loss of green resources, which leads to the destruction of large areas of vegetation on the earth. Xiaohe composition network
Due to the large-scale destruction of forest resources by human beings, the area of human activities is even smaller because only part of our land is used for reclamation; This not only narrowed the scope of human activities, but also triggered natural disasters. In the end, people were punished by nature.
As we all know, only plants on the earth can absorb carbon dioxide and exhale oxygen. Scientists have calculated that the carbon dioxide absorbed by three trees in one day is equivalent to the carbon dioxide exhaled by an adult in one day. According to this calculation, plants are really important to human beings. So we must take good care of plants.
Clothes can be mended when they are broken, desks and chairs can be repaired when they are broken, shoes can be washed when they are dirty, people can be cured when they are sick, but the earth is incurable when it is sick. So we must love our earth as much as we love life.
Due to the rapid development of modern industry and the continuous improvement of human living standards, there are more and more factories and cars everywhere, which have caused a lot of waste gas, seriously polluted the air on which humans, animals and plants depend, and caused a large number of trees to die. Cutting down trees has led to a large area of land desertification. If Han has land, how can we survive? According to my parents, they never saw sandstorms when they were children, but today, decades later, there have been several serious sandstorms and sand blowing for two consecutive years. In our small village in Dulbert, Heilongjiang, it used to be a beautiful village. There was a river with flowers and trees, and people lived quickly in the east. However, the villagers there only know how to raise cattle and sheep in an unplanned way, cut down trees for farming in an unplanned way, a large number of cattle and sheep ate up the grass on the ground, people cut down all the trees, and the land was flooded by wind and sand. People there have no land and have to leave their homes with tears in their eyes for generations. What a sad tragic scene!
Protecting the environment on which we live and planting a large number of trees to prevent sandstorms have become a top priority. We can't let the tragedy continue. Protecting the earth is the responsibility of each of us. We should start from ourselves, from childhood, make our earth younger and more beautiful, make our air cleaner and our rivers cleaner. Let's work together to create a beautiful living environment! Let's work together to create a beautiful living environment! Let's build the Great Green Wall in Wan Li to resist sandstorms.
We must do it ourselves to protect the environment. From now on, let's return the motherland to youth, beauty and blue sky.