Biology Homeostasis PMDC Conceptual Practice
PMDC Verified Question 24 of 99
Which xerophytic adaptation directly functions to reduce the rate of cuticular transpiration?
A
Large surface area of leaves
B
Thick waxy cuticle
C
Increased density of stomata
D
Presence of stomata on both leaf surfaces
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Thick waxy cuticle
Concept: Adaptations limiting transpiration.

Solution: A thick waxy cuticle composed of hydrophobic cutin coats the leaf epidermis, creating an impermeable barrier to water evaporation.

Why other options are incorrect:
  • Option A, Option C & Option D: Increased surface area, higher stomatal density, and amphistomatous leaves all increase transpiration rates.

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