<span>A. genetic variation in species
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Glycolysis, the first process in cell respiration, produces four ATP, but it uses two of the ATP molecules, therefore producing a net two ATP molecules. The process also has two molecules of NADH.Glycolysis begins with glucose and breaks it down into two molecules of phosphoglyceraldehyde.
hope that helps u, im doing the same thing in school
2. the inability to adapt to its environment. if a bird lives in a tree and itgets cut down it has to find a new tree. it has to adapt..find a new habitat. if it can't do that, it has no shelter and dies