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vagabundo [1.1K]
3 years ago
8

There are no fossils of mammals in the oldest layers of rock. What

Biology
2 answers:
Lynna [10]3 years ago
5 0

Answer:

Explanation:

This tells us mammals probally werent around yet

mrs_skeptik [129]3 years ago
3 0

Answer:

They were not around at that time or either from it being so hot they just disappeared/melted.

Explanation:

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1.

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