Home Biology Organisms and Populations All Topic Question For Revision Test Thorns of Acacia and cactus are the most com…
Biology Organisms and Populations All Topic Question For Revision Test Single Correct MCQ
Published on: August 14, 2026

Thorns of Acacia and cactus are the most common morphological means of

A
reproduction
B
competition
C
defence
D
economical importance

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The correct answer is:
C

In biology, thorns (found in Acacia) and spines (found in cactus) are specialized physical adaptations that plants use to protect themselves from being eaten by herbivores (grazers and browsers). Because plants cannot run away from predators, they evolve these morphological "weapons" to discourage feeding.

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