Photosynthesis and cellular respiration are related to each other through O A. the cycling of carbon in various forms as it moves through different living and nonliving systems.
O B. only the breaking down of molecules that support chemicals reactions that occur in living things.
C. thebyreliance on processes like fossilization, combustion, feeding, etc. to move chemicals needed to support life.
O A and B
O A and C

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.

Nucleic acids offer variability because they contain alternate forms of genes called .

Which of the following statements is true of cells