Energy in most ecosystems must flow through autotrophs because a. only autotrophs can convert solar energy into chemical energy. b. autotrophs are simpler organisms than heterotrophs. c. heterotrophs only generate a small fraction of their energy from photosynthesis.. d. all of the above.

The best answer is a. only autotrophs can convert solar energy into chemical energy. This means that these are organisms which are literally based on the greek name self-producers that can create complex organic substances by fixing together simple building blocks in their local environment. Eg plants on land.

A. only autotrophs can convert solar energy into chemical energy.

In some developing nations the percentage of the animal protein from fish in the diet can be as high as 25 percent.  about 85% of fish caught is used for human consumption.  the remainder is converted into fishmeal and fish oil. 

The answer is centrioles forming happens in animal cell mitosis but doesn't happen in plant cell mitosis.