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1. Biologists assert that present-day reptile diversity can be explained by the

ID: 27262 • Letter: 1

Question

1. Biologists assert that present-day reptile diversity can be explained by the theory of descent with modification. What does descent with modification mean? (1 pt) a. An organisms environment causes changes in its traits, making the organism better suited for that environment. b. Species share a common ancestor, and their traits reflect both that ancestry and changes over time. c. Species gradually become better adapted to their local environment over evolutionary time scales. d. An organism keeps its beneficial traits, and modifies or discards other traits.

Explanation / Answer

b. Species share a common ancestor, and their traits reflect both that ancestry and changes over time.