daradiscua daradiscua

20-11-2020
Biology

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What are the MAIN processes through which oxygen is cycled?
A
acid rain and greenhouse effect
B
nitrogen fixation and combustion
С
decomposition and respiration
D
photosynthesis and respiration

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alicyabaca14 alicyabaca14

20-11-2020

I’m pretty sure the answer is D

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