Online GK Series

This site is dedicated to the aspirants of competitive exams SSC, UPSC, Railways, Postal Assistants, Bank, GATE and NET

Get Attractive Job

Q.

Among living organisms, which one of the following is the most responsible factor for bringing about the origin of a new species?

A Isolation
B Mutation
C Sexual reproduction
D Natural selection
Answer & Explanation
Option: [A]

Your Valuable Comments Please...

Important EBooks for Competitive Exams

VIEW ALL