Question
Biology Question on evolution and natural selection
Theory of Natural Selection dwells on
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 the above.
Answer
natural selection acting on favourable variations
Explanation
Solution
The theory of natural selection is based on the following factors :
(i) Rapid multiplication and limited food and space which leads to struggle for existence.
(ii) Struggle for existence and variations which leads to natural selection or survival of the fittest.
(iii) Natural selection and inheritance of useful variation over many generation which leads to formation of new species.