Question

'Genetic drift' and 'natural selection' together result in the formation of new
species of organisms. How? Explain.
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Answer 1

Answer:

Natural selection and genetic drift both result in a change in the frequency of alleles in a population, so both are mechanisms of evolution. ... Genetic drift causes evolution by random chance due to sampling error, whereas natural selection causes evolution on the basis of fitness.

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Answer 2

The given two processes result in the formation of new species of organisms because:

1. Genetic Drift:

• This is the process of forming new species by chance.
• The frequency of alleles is modified at random, and those that were previously uncommon become more common since they are more frequently reproduced than other allelles.
• The whole new population is made up of these alleles, which were only found in small numbers in the prior population.

2. Natural Selection:

• This is the process of new species forming based on an organism's capacity to adapt to and survive in its environment.
• Those creatures that do not survive perish, while those that do survive to form a population with unique adaptive characteristics.
• This is referred to as speciation.

• In this way, both of these processes contribute to organism evolution and the emergence of new species.