. State and describe in brief any three main factors responsible for the rise of a new species.


Best Answer

Ans. Ans. The process by which new species develop from the existing species is known as speciation.

Important factors which could lead to the formation of a new species are as follows:

i. Genetic drift caused by drastic changes in the frequencies of particular genes by chance alone.                                                                                                                

ii. Geographical isolation of a population caused by various types of barriers like mountain ranges, river, sea etc. The geographical isolation leads to reproductive isolation due to which there is no flow of genes between separated groups of population.

iii. Sometimes   the   sub-population becomes   reproductively    isolated   by   ecological barriers. Therefore it  occurs 

within  the  same  geographical  area  and  within  the original  population.

 

 

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