Biology Evolution UHS 2022
PMDC Verified Question 30 of 47
Adaptations that an organism acquires by its own actions during its life span without modifying its genome are:
A
Heritable
B
Non-heritable
C
Can be made heritable through some modification
D
Sometimes heritable and other times non-heritable
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Non-heritable
Concept:

Evolution operates on genetic variations that can be passed from parent to offspring. Traits acquired purely through environmental influence or physical actions do not alter the DNA sequence in gametes.

Solution:

  • According to modern genetics, modifications acquired during an organism's lifetime (like enlarged muscles from weightlifting) are strictly somatic (body cell) changes.
  • Because they do not modify the organism's genome (the DNA in reproductive cells), these traits cannot be passed to the next generation.
  • Therefore, they are strictly non-heritable.


Why other options are incorrect:

  • Heritable / Can be made heritable: Lamarck historically believed acquired traits were heritable, but this was disproven by modern genetics (e.g., Weismann's experiments).

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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