1. Let energy flow to the most meaningful part of human beings continuously and efficiently.

2. The energy transfer efficiency of two trophic levels is 10%-20%.

3. One-way flow gradually decreases.

4. Fungi pH 5.0-6.0, bacteria pH 6.5-7.5 and actinomycetes pH 7.5-8.5.

5. As the carrier of energy, matter makes energy flow along the food chain.

Biology in senior high school is a high school subject stipulated by the state. Most provinces use PEP textbooks, and some provinces have also published different versions of textbooks.

But the general content is the same.

PEP textbook * * * 6 volumes for senior high school. Compulsory courses 1, 2 and 3 are compulsory, and elective courses 1, 2 and 3 are for students to choose and study independently.