The fossil record supports the hypothesis of common descent.
Fossil record refers to the dead and decaying remains of the plants and animals that were buried deep down into the earth millions of years ago. They can be in the form of impression or traces. Fossils allow the scientists to study about the organisms of the past and analyze how the evolution occurred to form current living organisms.
Common descent can be defined as a species that undergoes diversion to form 2 or more different species. The single species then becomes the common descent of the new diverged species, and is also called the ancestral species.
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