Biology Homeostasis PMDC Conceptual Practice
PMDC Verified Question 37 of 99
Organisms that do not actively regulate internal salt and water balance, allowing internal fluid osmolarity to match the external environment, are called:
A
Osmoregulators
B
Thermoregulators
C
Anhydrobiotic organisms
D
Osmoconformers
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Osmoconformers
Concept: Physiology of osmoconformity.

Solution: Osmoconformers maintain internal fluids iso-osmotic to their marine environment, avoiding net osmotic gradient stresses without active ion pumping.

Why other options are incorrect:
  • Option A: Osmoregulators actively expend energy to maintain an internal osmolarity different from the surrounding medium.

  • Option B: Thermoregulators regulate body temperature.

  • Option C: Anhydrobiotic organisms tolerate near-complete desiccation.

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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