Question

Choose the correct answers from the alternatives given.
Natural selection is best defined as occurring when the environment causes

• A. differential mortality
• B. assortative mating
• C. a reduced gene pool
• D. differential success in reproduction

Answer 1

The correct option is D differential success in reproduction

The organism that is better adapted to the environment and hence, can produce more of its type is selected. Its population eventually grows and the other one is wiped out. Over long periods, this can even give rise to speciation i.e. formation of new species.

Hence, the correct answer is 'differential success in reproduction'