Biology Evolution ETEA 2022
PMDC Verified Question 34 of 47
A small biological unit that can evolve over time is ____
A
A specie
B
A population
C
An organism
D
Cell
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: A population
Concept:

Evolution operates on groups of interbreeding individuals, not on solitary entities.

Solution:

  • An individual organism cannot evolve during its lifetime; it can only develop or acclimate.
  • Evolution is defined as the change in allele frequencies over time.
  • The smallest biological unit capable of exhibiting this change over successive generations is a population.


Why other options are incorrect:

  • An organism / Cell: Individuals do not evolve; they retain the same genetic sequence from birth to death.
  • A specie: While species evolve, a population is a smaller, localized unit of a species that is the fundamental operating level of microevolution.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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