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Gnom [1K]
3 years ago
9

I need help with these two questions.

Biology
2 answers:
Katena32 [7]3 years ago
6 0
I don’t know 22 but I think 21 is B
Genrish500 [490]3 years ago
3 0

21 food and oxygen

22 H

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the autonomic (involuntary) nervous system controls the rate at which the heartbeats. sympathetic (fight or flight) signals spee
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