Evolution Ques 135
135. Theory of Natural selection dwells on
[1993]
(a) role of environment in evolution
(b) natural selection acting on favourable variations
(c) changes in gene expression resulting in heritable variations
(d) none of these
Show Answer
Answer : c
Hints & Solution
(c) In 1859 Charles Darwin published his theory of natural selection in the book ‘On the Origin of Species’. The theory is based on four important observations: All species have some reproductive potential Most populations are stable in size under ideal conditions Natural resources are limited Individuals of a population have variations. Most of the variations are heritable. Variations in species are selected by nature.
BETA
