Which characteristics do glycogen and starch share? a. they are the most energy- rich organic molecules b. both are difficult to digest c. they are proteins d. both are storage from the glucose

In what for do plants utilize nitrogen? why do they need nitrogen?

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.

Do plant cells perform cellular respiration?