Fitness according to Darwin refers to

Options

A. number of species in a community
B. strength of an individual
C. reproductive fitness of an organism.
D. reproductive fitness of an organism.

Answer

D

Explanation

The fitness, according to Darwin, refers ultimately and only reproductive fitness. Hence, those who are better fit in an environment, have more progeny than others. These, therefore, will survive more and are selected by nature. He called it natural selection and implied it as a mechanism of evolution.