What was the big piece of the puzzle that was missing from Darwin's theory of evolution in his day?
A) a selection mechanism
B) a method of inheritance
C) a lack of variation in the organisms he studied
D) a mechanism for reproduction
E) more than one of these

Question

Quizplus · Accepted Answer

Darwin's theory of evolution by natural selection lacked an understanding of the mechanism of inheritance, which was later explained by the discovery of genetics and Mendel's work on heredity.

What Was the Big Piece of the Puzzle That Was