These questions consist of two statements each, printed as Assertion and Reason. While answering these questions you are required to choose any one of the following four responses :
Assertion. Bract is represented by a scale, single veined called lemma in family Gramineae.
Reason. Bracteole in family Gramineae is represented by two nerved palea
Both Assertion and Reason are true but Reason is not a correct explanation of the Assertion.
— Concept: This question tests your knowledge of floral morphology, specifically the structure of inflorescences in the…Concept: This question tests your knowledge of floral morphology, specifically the structure of inflorescences in the family Gramineae (Poaceae), focusing on bracts and bracteoles.
Why (B) is correct:
1. Assertion is true: In the family Gramineae (grasses), the bract subtending the spikelet is indeed represented by a scale-like structure called the lemma. It is typically single-veined and encloses the flower(s).
2. Reason is true: The bracteole in Gramineae is represented by the palea. The palea is usually two-nerved (two-keeled) and is located opposite the lemma, enclosing the flower from the inner side.
3. Reason is not a correct explanation of the Assertion: Both statements are individually correct facts about the floral structures in Gramineae. However, the nature of the palea (bracteole) being two-nerved does not explain why the lemma (bract) is single-veined or scale-like. They are distinct morphological features.
Common Mistake: Students often confuse the terms lemma and palea, or their roles as bract and bracteole, respectively. Remember their positions and characteristic venation.
NEET Tip / Mnemonic: Think of Lemma as the Larger, Lower, Leaf-like structure (bract) and Palea as the Protective, Paired-veined (two-nerved) structure (bracteole) inside the lemma.
Correct Answer: (B)
Both Assertion and Reason are true but Reason is not a correct explanation of the Assertion.