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Gwar [14]
4 years ago
8

What happened during the Cambrian explosion

Biology
1 answer:
vovangra [49]4 years ago
4 0
The Cambrian period was important because it marked a dramatic burst of evolutionary changes in life on Earth. I<span>t is also the time when most of the major groups of animals first appeared in fossil records.</span>
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Answer:

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The pulmonary vein is different from other veins found within the body, which carries deoxygenated blood or blood filled with carbon dioxide from different parts of the body to the heart. Thus, it is clear that carbon dioxide does not pass through the pulmonary vein.  

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