28. Which statement accurately describes the energy needs for photosynthesis and cellular respiration?
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e
O
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P

Explain the importance of producers, primary consumers, secondary consumers. and decomposers in an ecosystem

If a checkpoint detects damaged dna, the checkpoint may

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