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Last Universal Common Ancestor

Created for Albert.io. Copyright 2016. All rights reserved.

In this treatise, (2) it speculated that all life forms on this planet, from humans to hermit crabs to single-cell organisms, likely evolved, over the course of millennia, from a single, primordial common ancestor.

A

NO CHANGE

B

he speculates

C

they speculated

D

he speculated

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