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Question 2 of 10
How do vestigial structures serve as evidence to support the theory of
evolution through natural selection?
A. Structures that have little or no function exist because an ancestor
once had a functional version.
OB. Structures in different species that have similar functions show
that all organisms have a common ancestor.
OC. Similar structures in different species that have different functions
are the result of organisms adapting to similar
environments.
OD. Structures that are used infrequently become smaller and are not
passed on to offspring.
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Vestigial organs are remnants of structures that were functional in ancestors but have reduced or lost their original function in current organisms. Their presence supports the theory of evolution because they indicate a common ancestry with organisms in which those organs were functional. They provide evidence of evolution by natural selection, showing that organisms have changed over time and that features once useful can become unnecessary due to changes in environment, behavior, or other factors.

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