Which of these bests explains the difference between the way animals and plants exchange gases with their environments?
animals use only photosynthesis, while plants use both photosynthesis and respiration.
animals use only respiration, while plants use both photosynthesis and respiration.
animals use both photosynthesis and respiration, while plants use only respiration.
animals use both photosynthesis and respiration, while plants use only photosynthesis.
Answers: 1
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Which line in the graph above best illustrates an effect of the carbon dioxide level in the blood on breathing rate before, during and after a period of exercise? 1.b,2.c,3.a,4.d
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