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Which of the following is true regarding the origin of animals?

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The fossil record suggests that animals evolved 565 million years ago

The fossil record suggests that animals evolved during the Vendian period of the latest Neoproterozoic era

The major groups of animals were formed by the beginning of the Cambrian period of the Paleozoic era

All the above

answer is D.

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Detailed Solution

The fossil record suggests that animals evolved 565 million years ago (Ma) during the Vendian period of the latest Neoproterozoic era.

By the beginning of the Cambrian period of the Paleozoic era, an explosive proliferation had established all of the major groups of animals.

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