Biology Homeostasis PMDC Conceptual Practice
PMDC Verified Question 98 of 99
During elevated environmental temperatures, terrestrial plants maintain thermal balance by losing water vapor from their leaves via:
A
Guttation
B
Transpiration
C
Photosynthesis
D
Osmosis
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Transpiration
Concept: Evaporative cooling in plants.

Solution: Transpiration is the evaporation of water from stomata and leaf surfaces, absorbing latent heat of vaporization to cool the plant body.

Why other options are incorrect:
  • Option A (Guttation): Exudation of liquid water droplets from hydathodes under high root pressure, which does not provide evaporative cooling.

  • Option C: Photosynthesis is a biochemical carbon-fixation pathway.

  • Option D: Osmosis is passive water movement across membranes.

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.

Previous Question All Homeostasis MCQs Next Question

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.

Enter Arena Sprint iOS App Android App