Question

1. a closed circulatory system is one in which

Answer 1

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1. B  (Blood flows through a system of blood vessels and throughout the body)
2.C (In blood vessels and sinuses)
3.B (Oysters do not move around, but squid are very active)
4.D (It is difficult for single pump to force blood through the entire system of a large animal)
5.A (Exchanging carbon dioxide for oxygen from the air)

Answer 2

1. B

2. C

3. B

4. D

5. A

100% Correct