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14 votes
Which organism has the more efficient heart?

A: a frog
B: a robin
C: an alligator
D: a tuna​

2 Answers

9 votes

Answer:

I think its a alligator or a frog I'm not rlly sure but I think it might be a alligator

User Cakraww
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4 votes
B. Robin

Mammals and birds have the most efficient hearts
User Zakmck
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