Which of the following is the major source of variation in the origin of new species?
Correct answer: B. Mutation
- A. Migration
- B. Mutation
- C. Selection
- D. Genetic drift
Explanation
Mutation is the most important factor in bringing about the origin of a new species. The mutation is the sudden heritable change and is the seat of all variations or the ultimate source of variation, evolution is a change in the genetic composition of the population brought about when natural selection acts on the variability of the population.
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About Evolution
Evolution describes heritable change in populations over generations through variation, natural selection and adaptation. Lamarckism explains inheritance of acquired characteristics, while Darwinism explains selection of favourable inherited variations; these historical explanations must not be confused with the modern genetic account of evolutionary change.
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