21. Evolution
Introduction to Evolution and Natural Selection
0:33 minutes
Problem 5b
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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