If the genetic diversity is low, then the chance of extinction is?
Correct answer: B. Increased
- A. Decreased
- B. Increased
- C. Remains the same
- D. Becomes zero
Explanation
Option B is correct as less genetic diversity is the raw material of evolution. Without genetic variation, a population cannot evolve in response to changing environmental variables and, as a result, may face an "increased" risk of extinction.
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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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