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DochEvi [55]
3 years ago
8

FOR FUN QUESTION

Geography
1 answer:
Anna11 [10]3 years ago
8 0

Explanation:

Given the importance of oxygen for animals, researchers suspected that a sudden increase in the gas to near-modern levels in the ocean could have spurred the Cambrian explosion. ... This supported the idea of oxygen as a key trigger for the evolutionary explosion.

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Question 1
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Answer:

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