Biology Homeostasis PMDC Conceptual Practice
PMDC Verified Question 53 of 99
Pigeons (birds), platypuses (monotremes), and pandas (placental mammals) maintain stable internal body temperatures and are classified as:
A
Homeothermic
B
Poikilothermic
C
Ectothermic
D
Heterothermic
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Homeothermic
Concept: Endothermic homeothermy in Aves and Mammalia.

Solution: Birds and mammals are homeothermic endotherms; they utilize metabolic energy to maintain a constant internal core body temperature.

Why other options are incorrect:
  • Option B & Option C: Poikilothermic and ectothermic animals (reptiles, amphibians, fish) allow body temperatures to fluctuate with external environmental temperature.

  • Option D: Heterotherms switch between poikilothermy and homeothermy depending on environmental conditions (e.g., torpor).

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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