Question

Assertion (A): Perisperm is a diploid tissue.
Reason (R): Perisperm is the remains of nucellus which surrounds the embryo in certain seeds.

• A. Both (A) and (R) are true and (R) is the correct explanation of (A).
• B. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
• C. (A) is true, but (R) is false.
• D. (A) is false, but (R) is true.

Hint:

Perisperm (diploid) is different from endosperm (triploid). Perisperm is maternal tissue (nucellus), while endosperm results from double fertilization.

Answer 1

The Correct Option is B

Step 1: Perisperm is the remnant of the nucellus, a maternal tissue in the seed, which surrounds the embryo in some seeds (e.g., in black pepper). Thus, Reason (R) is true.
Step 2: The nucellus is a diploid tissue (2n) since it is part of the maternal sporophyte. Hence, perisperm, being the remains of the nucellus, is also diploid. Assertion (A) is true.
Step 3: While both statements are true, the reason does not explain why perisperm is diploid; it only describes what perisperm is. The ploidy explanation requires understanding the maternal origin of the nucellus, which is not directly stated in (R).
Thus, the correct answer is (B).