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Which of the following is NOT a mechanism of evolution proposed by Darwin?
  • a)
    Natural selection
  • b)
    Genetic drift
  • c)
    Migration
  • d)
    Mutation
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Which of the following is NOT a mechanism of evolution proposed by Dar...
Genetic drift is not a mechanism of evolution proposed by Darwin. Genetic drift refers to random changes in gene frequencies within a population, primarily occurring in small populations where chance events have a more significant impact.
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Which of the following is NOT a mechanism of evolution proposed by Dar...
Explanation:

Natural selection:
Natural selection is a mechanism of evolution proposed by Charles Darwin. It is the process by which favorable traits or variations in a population become more common over time, while unfavorable traits become less common. This occurs because individuals with traits that are advantageous for their environment are more likely to survive and reproduce, passing on their genes to future generations. Over time, this leads to the accumulation of beneficial traits and the adaptation of populations to their environments.

Genetic drift:
Genetic drift is a random process that can cause changes in the gene pool of a population. It occurs when the frequency of certain alleles (variants of a gene) fluctuates by chance, rather than due to natural selection. Genetic drift is more likely to occur in smaller populations, where chance events can have a greater impact on allele frequencies. While genetic drift can lead to evolutionary changes, it is not a mechanism proposed by Darwin himself.

Migration:
Migration, also known as gene flow, is the movement of individuals from one population to another. This can introduce new alleles into a population or change the frequency of existing alleles. Migration can have a significant impact on the genetic diversity of a population and can prevent populations from becoming genetically distinct from one another. Darwin recognized the role of migration in shaping the genetic composition of populations and considered it as a mechanism of evolution.

Mutation:
Mutation is a process that introduces new genetic variations into a population. It is the ultimate source of genetic diversity and provides the raw material for evolution. Mutations can occur spontaneously and can lead to changes in the DNA sequence of genes. While most mutations are neutral or harmful, occasionally they can be beneficial and provide an advantage for survival and reproduction. Darwin recognized the importance of mutation in generating variation within a population.

Therefore, the correct answer is option 'B' (Genetic drift) because it is not a mechanism proposed by Darwin. The other options (natural selection, migration, and mutation) are all mechanisms of evolution that Darwin included in his theory of evolution by natural selection.
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Which of the following is NOT a mechanism of evolution proposed by Darwin?a)Natural selectionb)Genetic driftc)Migrationd)MutationCorrect answer is option 'B'. Can you explain this answer?
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