Which of the following structures is unique to the seed of a monocot?
Coleoptiles
— Concept: This question tests your knowledge of the unique structural features found in monocot seeds, specifically…Concept: This question tests your knowledge of the unique structural features found in monocot seeds, specifically focusing on protective sheaths.
Why (A) is correct: Coleoptile is a protective sheath that encloses the young shoot (plumule) of a monocot seedling. It is a characteristic feature of monocot seeds and is absent in dicot seeds.
Why other options are wrong:
- (B) Radicle: The radicle is the embryonic root found in both monocot and dicot seeds.
- (C) Seed coat: The seed coat is the protective outer layer of the seed, present in both monocot and dicot seeds.
- (D) Endosperm: Endosperm is the nutritive tissue found in many seeds (both monocot and dicot), though its persistence and development vary.
Common Mistake: Students sometimes confuse coleoptile (shoot protection) with coleorhiza (root protection) in monocots.
NEET Tip: Remember that monocots have 'coleo' structures (coleoptile and coleorhiza) for protection of their embryonic shoot and root, respectively.
Correct Answer: (A)
Coleoptiles