Explain the following:(a) Speciation(b) Natural Selection


(a) Speciation is the process of the formation of new species either by evolution or by genetic modification of the existing species in a population.

Factors responsible for speciation are natural selection, genetic drift, geographical isolation and mutation.

(b) Natural Selection:

The organisms with useful traits and higher adaptability will survive. The fittest organism will be able to survive in the world.

Naturally selected over-abundance of offsprings can lead to a struggle for existence. Organisms with variations can survive and reproduce in an effective manner, producing a large number of offsprings with a longer life span.

Offspring of survivors inherit the useful variations to the new generation and this variation becomes an inherited feature. 

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Updated on: 20-Mar-2023

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