Question

Darwins theory of evolution is based on the concept of

Answer 1

The theory of evolution by natural selection, first formulated in Darwin'sbook "On the Origin of Species" in 1859, is the process by which organisms change over time as a result of changes in heritable physical or behavioral traits.

Answer 2

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$\longrightarrow \sf{}$ Key concepts in the evolution theory of darwin are as follows:-

$\small\implies{\sf{}}$ Overproduction Or enormous fertility :- Living beings have an innate ability of producing their own progeny for the continuity of race.

$\small\implies{\sf{}}$ Struggle for existence:- according to darwin individual multiply in geometric ratio whereas space and food remain almost constant.

$\small\implies{\sf{}}$ Variations and heredity:- the everlasting completion among the organisms compels them to change according to the conditions so that they can survive successfully.

$\small\implies{\sf{}}$ Survival of the fittest or natural selection:- during the struggle for existence only those individuals could survive which exhibit such variations that are more beneficial in facing the hardships and rigours of environment or which change to adapt themselves to the changing conditions. this is known as natural selection.

$\small\implies{\sf{}}$ Origin of species :- natural selection results in modification of trait within a lineage which over a period of time can bring about evolution.

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