Answer:
Key concepts of Darwin's theory of
evolution are as follows
(i) Over Production Living beings have
an innate ability of producing own kind for the continuity of race. It has been
observed that more individuals of each kind are produced than could possibly
survive.
(ii) Struggle for Existence
Individuals multiplying geometric ratio, whereas space and food remain almost
limited.
(iii) Variations Members of a
population vary is size, form and other characteristics even though they look
superficially similar, no two individuals are alike. These variations are
gradual and those with adaptive value are passed on to next generation.
(iv) Survival of the Fittest and
Natural Selection During struggle for existence only those individuals could
survive which exhibit beneficial variations and adapt better to changing
environment. This is known as natural selection.
(v) Origin of Species Natural
Selection results in modification of traits within a lineage, which over a
period of long time can bring about evolution of original species into new one.
You need to login to perform this action.
You will be redirected in
3 sec