Animal food ingredients

In normal study, work and life, everyone has tried to write a composition. Composition is a transition from internal language to external language, that is, from a compressed and concise language that one can understand to a developed and standardized grammatical structure that others can understand. Do you know how to write a good composition? The following are five kinds of animal foods that I have compiled. Welcome to reading. I hope you will like them.

1 food chain refers to the food network relationship formed by mutual restriction and interdependence of organisms.

In the African savannah, carnivores, such as lions, cheetahs and hunting dogs, specialize in eating herbivores. Their killing of wildebeests and even zebras is brutal, but this cruel killing is necessary for the survival of carnivores and an indispensable factor for maintaining grasslands.

Without the control of carnivores on herbivores, herbivores will develop rapidly. When the number of herbivores reaches a certain level, the grassland will be overwhelmed and degraded, and the herbivores will lose the conditions for survival and development. Therefore, if there are no carnivores, the grassland will be degraded, and it is natural and reasonable for carnivores to kill herbivores. We should also thank them!

I know such a story: in Australia, wolves eat sheep and it is almost extinct. So, the Australians shot the wolf. Sheep have almost no natural enemies and suddenly become stronger. Because there are too many sheep, the grassland has degenerated and almost disappeared. So people tell wolves to eat sheep, so that the number can be balanced. Carnivores feed on herbivores and also protect grasslands.

This kind of thing has happened in our country: Hulunbeier grassland, one of the largest grasslands in the north of China, is rich in pasture, with herds of cattle and sheep, but there are countless wolves. People began to catch wolves, which made wolves afraid to take grasslands as their homes and feed on cattle and sheep. So cattle, sheep and rabbits began to compete for food, which degraded the grassland.

People can't plunder resources and destroy the ecological balance for their own vital interests. However, human beings cannot survive because of nature, and protecting ecological balance is also protecting human beings themselves. Once the ecology is destroyed, human beings themselves are doomed.

When I was in the fifth grade, I once learned an article called Snakes and Crops. At that time, I learned a word "food chain", which was completely strange to me at that time. According to data, the concept of "food chain" was first put forward by American scientist Lin Deman. When he was studying lakes, he came across a proverb from China, which was "eat small fish, a big fish, eats shrimp and shrimp eats sludge". He got inspiration from it and put forward the concept of "food chain". So, what is the food chain? Huxley, a famous British scientist, once told a humorous story. He said: "British cats are mainly fed by old ladies, so the strength of the British navy should be attributed to British cat owners." Where do you start?

Clover is rich in England, which is the main feed for cattle. Wild bees can effectively pollinate the dark flowers of clover. Clover can flourish mainly because of wild bees. However, voles like to eat honey and larvae of wild bees, which affects the pollination of clover. Scholars have found that there are more wild beehives near the English countryside than anywhere else, because there are many cats in the village. Cats eat voles, so clover thrives there, providing rich feed for cattle. Clover is the staple food of cattle, and the staple food of British navy is canned beef. So clover contacted the British Navy again.

Therefore, cows eat clover, wild bees pollinate clover, voles eat honey and larvae of wild bees, and cats eat voles. That cat is a great hero who makes clover flourish. From this perspective, Britain has a navy that dominates the sea. Finally, it should be attributed to the cat, and further, it should be attributed to the lady who owns the cat. How amazing and interesting the food chain is!

Although Huxley's words are humorous, they profoundly and vividly illustrate an important concept in ecology-food chain.

Now, you should know what food chain is! In an ecosystem, all kinds of creatures are connected by food relations. One kind of organism feeds on another kind of organism, and the other kind feeds on the third kind of organism ... and they form a food chain, which is called food chain. The food chain often begins with plants and ends with fierce carnivores. The food chain is a food path that connects different species in the community. Energy and nutrients in the food chain are transferred between different organisms. This is called the food chain.

Science is everywhere. As long as you carefully observe life, observe and think diligently when you encounter problems, and actively consult information, you can find the true meaning of science.

Today is Sunday. After finishing my homework, I had nothing to do, so I carefully watched the little turtle eat meat. I first filled the whole fish tank with water, then cut the meat into small pieces with scissors and gently put the meat into the fish tank. When the little turtle found the meat, he slowly put his head over and ate it with relish.

Some meat was cut too big for the little turtle to eat, so he stirred the meat with his front paws and cut it into small pieces. How sharp the little turtle's claws are! I like watching little turtles eat meat.

One day, Mother Rabbit and Little Rabbit went to pick radishes. When they went home, the little rabbit got a raised radish leaf. Mother said, "honey, radish doesn't eat leaves, it eats roots." The rabbit was very happy and ate the radish root. Remember, it's eating roots.

After eating the radish at home, Mother Rabbit quickly tasted the green vegetables, and she began to eat the roots of the green vegetables happily. Mother rabbit rushed over and said, "Green vegetables should eat leaves, not roots." The rabbit said, "Mom, didn't you say you wanted to eat roots?" Mother rabbit said again, "that's radish."

Little rabbit understood his mother's words and ate vegetables happily.

In late autumn, the radish in the radish field grows big and red, which looks like a green carpet from a distance.

On this day, mother rabbit took her little rabbit to the radish field to pull out carrots. Mother picked a basket of big and tender radishes and put it beside her. She told the rabbit to sit there and watch the radishes and pull them out by herself. The radish leaves in the basket are so tender! Bu xiangzhen! Watching the rabbit drool involuntarily. It picked the biggest radish and ate it with relish. Then her mother came over and said with a smile, "Silly child, eating radish is not eating leaves, but eating roots, so remember." The little white rabbit nodded and swallowed the radish in one gulp. "Ah, radish is much more delicious than leaves."

They came to the cabbage field again. Mother took out a big basket of cabbage and let the rabbit watch. The rabbit remembers that his mother said to eat the roots on carrots, so he picked up the Chinese cabbage and began to eat the roots. Mother came over and shook her head after pulling out the cabbage and said, "Son, eating cabbage is not the same as eating radish. It wants to eat leaves. "

The little rabbit ate the leaves of Chinese cabbage and thought, "there is a way to eat." I will look carefully in the future, or I will make a joke. "