Question

List three main factors responsible for the speciation and briefly describe each one of them

Answer 1

1) Natural Selection - This is a phenomenon by which organisms better adapted to the environment tend to survive and reproduce more. 2) Geographical barriers - This is a phenomenon by which geographical barriers like distance, mountains, rivers etc. separate the poplulations of a species. Due to this, the population adapt differently to their environment, accumulate different variations and get reproctively isolated which ultimately results in the formation of a new species. 3) Genetic Drift - Random changes in the frequency of alleles in a gene pool, usually in small populations, irrespective of it being beneficial or harmful.

Answer 2

Answer:

Genetic Drift: Random change in the frequency of genes.

Natural Selection : Nature selects the fittest individual in a population.

Reproductive Isolation : When two individuals are geographically isolated and natural selection operates upon them differently leading to inability of the individuals to interbreed.