Biology Evolution UHS 2023
PMDC Verified Question 19 of 47
Which of the following is the main point of Darwinism?
A
Over production
B
Variation
C
Disuse of organ
D
Perceived unity of life
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Variation
Concept:

Darwinian evolution hinges on the pre-existing genetic differences among individuals within a population.

Solution:

  • While overproduction and survival of the fittest are key components, the absolute foundational requirement for natural selection is Variation.
  • Without variation in traits, natural selection has nothing to "select" from; no individual would possess an advantage over another, making evolutionary adaptation impossible.


Why other options are incorrect:

  • Disuse of organ: This is a hallmark of Lamarckism, not Darwinism.
  • Over production / Unity of life: These are observations and conclusions of the theory, but variation acts as the fundamental raw material driving the mechanism.

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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