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-BARSIC- [3]
3 years ago
11

Which factor affects the heart rate in mammals?

Biology
2 answers:
Ainat [17]3 years ago
5 0
I think the correct answer from the choices listed above is the last option. It is the need for oxygen that affects the heart rate in mammals. Depending on the needs of these organism, the oxygen needed for the processes inside the body varies which then affect the heart rate.
MariettaO [177]3 years ago
5 0

Answer:

c

Explanation:

i got them all right

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