The resemblance of a stick insect to the twig on which it rests is best explained by
Correct answer: A. natural selection favouring camouflaged variants over many generations
- A. natural selection favouring camouflaged variants over many generations
- B. the insect stretching its body towards twigs
- C. Lamarck's inner need for safety
- D. pure chance in every individual
Explanation
Birds removed the conspicuous insects generation after generation, leaving the better disguised to breed, until resemblance became remarkable. The insect does not change on purpose; selection filters what variation offers.
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About Concept of Evolution
Evolution is the heritable change in populations over generations, driven by mutation, recombination, natural selection, genetic drift and reproductive isolation. Questions examine variation, adaptation, survival and reproduction, speciation, fossil and anatomical evidence, and the difference between individual acclimatization and evolutionary change in a population.
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