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IceJOKER [234]
2 years ago
11

What type of muscle contracts and relaxes to control the movement of the contents within its structures

Biology
1 answer:
allochka39001 [22]2 years ago
6 0
Skeletal muscles mechanically move the body. Messages from the nervous system cause these muscle contractions.
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Answer:

The most closely related are amphibians and reptiles.

The least related are amphibians and mammals

Explanation:

Amphibians broke off from reptiles, birds, and mammals around 260 millions years ago and next up are the reptiles which broke off around 225 million years ago. So they are the most closely related


Mammals are the last to break off, around 200 million years ago. So they are the least related to amphibians.


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