Animal Biological Chain 20 lessons for the sixth grade of primary school Chinese

The biological chain refers to the interdependent chain relationship formed by animals, plants and microorganisms providing food to each other.

This relationship is easy to see in nature. For example, where there are trees, there are often birds, and where there are flowers, there are often insects. Plants, insects, birds, and other organisms are bound together by a chain of organisms, dependent on each other to live and die.

Examples of biological chains are often all around us, and they benefit humanity immensely. For example, the leaves and fruits grown by plants provide food for insects, insects become a food source for birds, and with birds, there will be eagles and snakes, and with eagles and snakes, rodents will not become plagued .......

When animal droppings and carcasses are returned to the soil, microorganisms in the soil break them down into simple compounds that provide nutrients to the plant and cause it to grow new leaves and fruits. In this way, the biological chain establishes a healthy cycle of substances in nature.

The biological chain can also be understood as the food chain in nature, which forms in nature"One thing descends one thing"maintains the natural quantitative balance between species. Humans and nature are also connected through the food chain. Human food is mainly derived from plants and animals.

Plants and animals are nourished from the natural environment before they grow. If these animals and plants contain ingredients from environmental pollution, it is dangerous for people to eat them. For example, if there is mercury pollution in nature, and some microorganisms in the soil can convert mercury into organic mercury, fish will store organic mercury in their bodies if they eat such microorganisms, and if people eat such fish, mercury will enter human nerve cells, and people will get the terrible Minamata disease.

Minamata disease is the most typical example of human pollution of the environment, and the contaminants end up entering the human body through the food chain and seriously harming human health.

The ruler is long and the inch is short, and such a sentence explains in simple terms the idea of making the best use of things and each having its own strengths.

In the natural ecology of natural selection, such examples also abound, which can be said to be exquisite.

Here's a relatively straightforward example:

If you let the king of the sky"Eagle vultures"and speed runners"Cheetah"Running more than 100 meters, I'm afraid they will be dumbfounded.

On the other hand, if the "cheetah" climbs a tree to make it fly, I am afraid that it will be scared half to death.

There are many such things in nature, and their different characteristics and advantages also create their different styles and advantages and disadvantages.

So don't focus on other people's strengths or weaknesses, and play to your own strengths as much as possible to be a true wise man. May I?

You can look for arguments like "failure is the mother of success". Let's find some celebrities who can represent your argument and write about it with his life experience!

Use your imagination and believe you can do it!

Dude, it's too much, just know that there are producers, consumers, decomposers.

Some people always like to stand out.

I like to give speeches and show off, and some people like to listen quietly.

Soak up the best of it.

Some people are extremely jealous.

Some people appreciate others and learn from each other.

Those who are gorgeous.

Going to society is like the frightened bird.

Immediately panicked, those who were mediocre-looking.

Like an eagle, flying in the air.

There is a poem that says, "Spiders make webs on the branches of trees." Don't get up in the wind, build a camp. People are not reluctant, not as good as spiders. "There are two spiders under the eaves of my house, and I hate spiders the most. Because spiders are venomous reptiles, I usually like to play tricks on them.

One day, I came to the flower bed and looked at the bright flowers, which made my heart feel refreshed. Suddenly, I noticed a spider's web in front of me, and a spider was sitting on the "Bagua Array" that he was weaving with his belly up. I saw the spider so arrogant, so I took a stick and stabbed its web.

After a long time, I saw the spider crawling on the web, and it was very good to fix itself in mid-air with silk, and then, grasping the opposite wire, sticking the wire firmly to it, and constantly changing positions, constantly pulling the silk out of its body, and an intact spider web was formed.

Another time, when the sky was overcast, I hurriedly ran to the flower bed to look for spiders. But with a lot of effort, I still couldn't find it.

It turned out that it was desperately weaving its own web under the eaves of my house. After a while, it was pouring rain, and the spiders were very safe under the eaves. Even if there are a few small drops of water on the net, they will immediately slide down the net.

Since then, I have changed my mind about spiders. The spider's web became a beautiful geometric figure in my eyes, and the spider became an example for me to learn from. I don't hate it anymore.

From the spider weaving webs, I was educated, realized a little truth, and learned a spirit. In order to survive, spiders are indomitable and persevering. Shouldn't we have the spirit of spider web weaving in our school life?