Biology Evolution ETEA 2022
PMDC Verified Question 33 of 47
The raw material that is used by natural selection for better survival is/are:
A
Variation only
B
Mutation only
C
Similarity only
D
Variation and mutation
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Variation and mutation
Concept:

Natural selection cannot operate without differences among individuals in a population.

Solution:

  • Mutations are the ultimate source of new alleles and genetic novelties.
  • These mutations lead to variations within a population.
  • Natural selection acts upon these variations, selecting for traits that enhance survival and reproduction in a specific environment.
  • Therefore, both variation and mutation act as the raw material for evolutionary change.


Why other options are incorrect:

  • Similarity only: Clones with identical genetics offer no variation for natural selection to act upon; the population would be equally susceptible to environmental pressures.
  • Selecting "only" variation or "only" mutation is incomplete, as they are inherently linked in providing evolutionary raw material.

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