Describe any three ways in which individuals with a particular trait may increase in population.
Three ways may increase a trait in population:
- Genetic drift : It causes drastic changes in frequencies of a particular trait/gene by chance only.
- The struggle for survival of fittest in populations eliminates unfit/unfavourable individuals. The fittest survive, reproduce and flourish and get selected by nature.
- Geographical Isolation of a population by means of different barriers like, sea, river etc. can lead to increase a particular trait by reproductive Isolation there.