Fossils/evolution/comparative Anatomy test

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When two species evolve together due to an ecological relationship, it is called

The change in living things over time is called

A ________ structure has the same parts/features in related species, but has a different function.

Evidence for the theory of evolution include

What type of evolution occurs when a species branches off into two separate species due to an isolating event?

The human appendix is an example of a

Earth's earliest atmosphere lacked which gas that is necessary for life as we know it to exist today?

Characteristics which improve an organisms chance of survival and reproduction is called