Animal nutrition is mostly heterotrophic.

1. Like green plants, the nutritional mode of using organic matter made by oneself to maintain life is called autotrophic, which is an important feature of various green plants.

Self-nutrition; In particular, carbon dioxide or carbonate can be used as the only carbon source and can be metabolized and synthesized by simple inorganic nitrogen-generally green plants, some chemoautotrophic bacteria and protoplasm; Normal metabolism does not need specific external factors.

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autotrophic

Autotrophic (1) is the antonym of heterotrophic. Also known as independent nutrition, independent nutrition and inorganic nutrition. There is no need for organic compounds as nutrition at all. In the presence of necessary inorganic nutrients, CO2 as a carbon source is reduced and assimilated, and all organic metabolites in cells are synthesized to carry out the whole life activities. (white translation)

(2) In many cases, there is no obvious boundary between autotrophic and heterotrophic. There are mistletoe and insect-eating plants at the same time, and some green algae, many photosynthetic bacteria and chemosynthetic bacteria are easy to grow differently under different conditions. When ordinary green plants can only carry out inorganic nutrition, they are called autotrophic, and when they can be transferred to organic nutrition, they are called eutrophic heterotrophy.

2. You can't directly synthesize inorganic matter into organic matter, but you must take ready-made organic matter to maintain a nutritious lifestyle, which is called heterotrophy. Heterotrophication includes growth, parasitism and saprophy.

* * * Born

1 mutual benefit * * * means that two creatures live together, which is beneficial to each other and cannot live independently after separation. Lichens, for example, are living organisms of fungi and algae. Lichens absorb nutrients through fungal mycelium and produce organic matter through the photosynthesis of algae plants. Fungi and algae in lichens cannot live independently if they are separated. Another example is the relationship between termites and intestinal flagellates, which is also mutually beneficial. Termites feed on wood, but they cannot digest cellulose by themselves. They must rely on enzymes secreted by intestinal flagellates to decompose cellulose, and the decomposition products can be used by both sides. There are ants and aphids; Leguminosae and rhizobia;

Another one is because * * * has the same interests and co-exists and co-prospers. For example, the relationship between the people of China and China is mutually beneficial. Depends on how you understand it. The first question belongs to the way of nutrition, and the second question belongs to the way of life.

Autotrophic type refers to the metabolic type in which most green plants and a few kinds of bacteria use light energy or chemical energy as energy source and carbon dioxide in the environment as carbon source to synthesize organic matter and store energy.

In terms of species, autotrophs can be divided into photoautotrophs and chemoautotrophs. Photoautotrophic type refers to the autotrophic type that uses light energy to synthesize organic matter from carbon dioxide in the atmosphere and water in the soil. The chemoautotrophic type refers to the autotrophic type that uses the energy released by the oxidation of ammonia into nitrate ions to synthesize organic matter from carbon dioxide in the atmosphere and water in the soil.

The obvious feature of autotrophs is that they can synthesize organic matter for their own life activities without consuming ready-made organic matter. At the same time, it provides a large amount of organic matter for consumers (organisms that can't synthesize organic matter by themselves, but can only maintain their own life activities by consuming ready-made organic matter) and decomposers (organisms that need to decompose organic matter to maintain their own life activities).

The appearance and survival of autotrophs in nature not only provide consumers and decomposers with a lot of organic matter, but also play an important role in maintaining the stability of carbon cycle and nitrogen cycle in nature. If there were no autotrophs, the carbon cycle and nitrogen cycle in our nature would not be balanced, and all living things in nature would not survive until now.

Heterotrophication is one of the three major types of biological metabolism, which refers to a metabolic type that can not synthesize organic matter by itself, but relies on the energy released by oxidation and decomposition of ready-made organic matter to maintain its own life activities. Similarly, the organism with aging metabolism is called heterotrophs. Heterotrophs uses organic matter in two ways. One is to completely decompose organic matter into carbon dioxide and water, and release a lot of energy at the same time. The other is to decompose organic matter into lactic acid or alcohol, carbon dioxide and other incomplete oxidation products. At the same time, heterotrophs in nature mainly includes consumers (organisms that can't synthesize organic matter by themselves, but can only maintain their own life activities by consuming ready-made organic matter) and decomposers (organisms that maintain their own life activities by decomposing organic matter).

For heterotrophs, it has one of the most obvious characteristics, that is, it can't make its own organic matter, and it can only survive by absorbing ready-made organic matter from the outside, otherwise it will be difficult for organisms to survive.

Therefore, heterotrophs also plays an irreplaceable role in the whole biosphere. If there is heterotrophs, the organic matter produced by autotrophs can be decomposed into inorganic matter smoothly, and the stability of carbon cycle and nitrogen cycle can also be kept stable, otherwise the whole biosphere will be seriously unbalanced or even cease to exist.

People's lifestyle can also be understood in this way! Some people live a hard life, but they are self-reliant. Some people depend on powerful people and others to support them, hehe, so it depends entirely on their own understanding.