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All energy originates from the sun.
The solar energy captured during photosynthesis becomes chemical energy. Chemical energy can become electrical energy needed for , electrical energy stored in fats or energy, which is given off back to the environment.

are organisms that feed themselves through photosynthesis. get their food by eating others.

Trophic levels are .
Write down some examples at each level to help you remember

On average, only about of the available energy is passed on from one level to the next.

What is called the "building block" of life?

Ineed the answer asap. in order to be considered alive, an organism must simultaneously possess the characteristics of homeostasis, heredity, cells, reproduction, and

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?