Evolution Question 97

97. Theory of Natural selection dwells on

[1993]

(a) role of environment in evolution

(b) natural selection acting on favourable variations

(c) changes in gene complex resulting in heritable variations

(d) none of these

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Answer : c

Hints & Solution

(c) In 1859 Charles Darwin published his theory of natural selection in the book ‘Origin of Species’. The theory is based on five important observations: All species have great reproductive potential Most populations are stable in size Natural resources are limited Individuals of a population have variations. Most of the variations are heritable. Species with variations selected by nature.