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belka [17]
3 years ago
15

PLLLZ HELP This graph best represents the populations of marine groups before and after the

Geography
1 answer:
tatiyna3 years ago
4 0

Answer:

Ordovician extinction .

Explanation:

The Ordovician extinction  was an event that occurred around 450 million years ago and caused the <u>disappearance of 60% of marine species.</u>

This event was caused by global cooling which resulted in the <u>drop of the sea level</u>. This change mostly affected the species that developed life in the deep, depriving them of their natural habitat.

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