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astraxan [27]
4 years ago
7

The only vertebrates in which blood flows directly from respiratory organs to body tissues without first returning to the heart

are the _____.
A) amphibians
B) fishes
C) mammals
D) reptiles
Biology
1 answer:
Elden [556K]4 years ago
3 0

Answer:

The correct answer is B) fishes

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