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The model shows how carbon dioxide can be cycled through plants and animals.

What is the source of carbon dioxide in the atmosphere, as shown by this model?


A. photosynthesis by plants and animals

B. photosynthesis by plants only

C. respiration by animals only

D. respiration by plants and animals

The model shows how carbon dioxide can be cycled through plants and animals. What-example-1
User KRH
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2 Answers

26 votes
26 votes
D.Repiration by plants and animals
User Tomekia
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5 votes

D. respiration by plants and animals

User Numan Salati
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