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Wewaii [24]
3 years ago
10

Which statements about the circulatory system of a mollusk are true?

Biology
1 answer:
goldenfox [79]3 years ago
5 0
<h3><u>Answer;</u></h3>

A. Gas exchanges takes place by diffusion.

B. It is an open system.

<h3><u>Explanation</u>;</h3>
  • Most molluscs and arthropods have an open type of circulatory system.
  • Open circulatory systems pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells.
  • Blood is pumped by a heart into the body cavities, where tissues are surrounded by the blood.
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How does the distribution of the world's major coal reserves support the theory of plate tectonics?(1 point)
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B) Around 300 million years ago, the regions where coal formed were located in tropical climates that were partially submerged on the coasts

Explanation:

The distribution of the world's major coal reserves supports the the theory of plate tectonics because the regions where they formed were in tropical climates around 300 million years ago.

Coal is a fossil fuel used to produce energy when burnt.

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  • Those regions must have moved from around the equator to their present day position.
  • The coal formed when they were much closer to the equator around 300 million years ago.

learn more:

Sea floor spreading brainly.com/question/9912731

#learnwithBrainly

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