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Elza [17]
3 years ago
7

Which two body systems must directly interact for vertebrate organisms to exchange gases? A) Skeletal system and muscular system

B) Excretory system and reproductive system C) Circulatory system and respiratory system D) Digestive system and immune system
Biology
1 answer:
Angelina_Jolie [31]3 years ago
5 0

Answer: The answer is B

Explanation:

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In the family tree below, people with the recessive trait of attached earlobes
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Explanation:

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