The theory of suggests that all the mammals alive today came from the same common ancestor.

The theory of adaptive radiation suggests that all the mammals alive today came from the same common ancestor.

Explanation:

Even though it might not sound something related to mammals, evolution, and biology. Adaptative radiation is the process in which one organism can evolution in a universe of different species when a major climate change occurs. Because this creates the perfect environment for species to adapt to a new life and develop the necessary characteristics to do it.

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