Question

When did abundant fossil evidence first appear in the geologic record?

300 million years ago

540 million years ago

5 billion years ago

3 billion years ago

Answer 1

Answer:

540 million years ago

Explanation:

Cryogenic is a geologic period dominated by glaciers and occurring prior to the Cambrian, when the fossil record shows a so-called explosion of most major groups of complex animals, including all the bilaterians (animals with a left and right side, unlike corals and sponges) — around 530 million years ago.

Answer 2

540 million years ago is the time when abundant fossil evidence first appear in the geologic record. Hence, option B is correct.

What is geologic record?

Geologic record is the record of natural science like stratigraphy, paleontology and other entity of rock strata. Specifically, deposits created by volcanism or sedimentation of debris subjected to weathering

It is important as it preserves the essential information about the change in climate about past.

Thus, option B is correct.

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