What three factors affect a land biome?

The krebs cycle is also known as the calvin cycle pyruvic acid cycle carbon - oxygen cycle citric acid cycle

According to cell theory; which structures carry out the basic function of living things? a. atoms b. organs c. cells b. nuclei

As a review, define the terms autotroph and heterotroph. keep in mind that plants have mitochondria and chloroplasts and do both cellular respiration and photosynthesis!