Question

Write a detailed paragraph on how natural selection can help explain evolution.

Answer 1

According to Charles Darwin's theory of natural selection by organic evolution evolution results from some natural factors.

They are :

Overproduction

Struggle for existence

Survival of fittest

Natural selection

Evolution of new species.

Primary aim of all animals is to reproduce and produce progenies all animals do this faithfully leading to overpopulated nature which is why nature keep checks like earthquake, forest fires etc.

Due to overproduction struggle for existence comes into picture where interspecific and intraspecific struggle occurs to utilise the resources available by the existing species.

After this struggle the fittest among the group survives. This is assisted by the useful variations present in organisms which allow them to survive adverse conditions among the individuals without variation.

The group which survive can pass on their characters (heritable variations) to next generation thereby giving rise to a new group with useful variations. Thus it is said that nature has selected this group of organisms who is overcoming the adversities over generation when compared to other groups. The other group may become extinct or reduce in number.

Thus this is how natural selection has led to origin of a new species.