The phrase "survival of the fittest" is often taken to mean that the strongest or fastest organisms are the ones that survive. In evolutionary biology, however, fitness does not refer to physical strength. ______ it refers to an organism's ability to survive and reproduce in a particular environment, passing its genes on to the next generation.
Which choice completes the text with the most logical transition?
Moreover,
Similarly,
As a result,
Rather,
Answer: D
The previous sentence says what fitness does not mean, and the final sentence gives what it does mean. "Rather" introduces a correct idea in place of a rejected one.
"Moreover" adds information, but the final sentence corrects a misunderstanding instead of adding to the previous point.
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