21. Evolution by Natural Selection
Descent with Modification
Problem 5c
Textbook Question
Textbook QuestionThe theory of common descent states that all modern organisms . a. can change in response to environmental change; b. descended from a single common ancestor; c. descended from one of many ancestors that originally arose on Earth; d. have not evolved; e. can be arranged in a hierarchy from 'least evolved' to 'most evolved'
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