A typical unfertilised, angiosperm embryo sac at maturity is 8 nucleate and 7-celled.

Question

Given below are two statements:

One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): A typical unfertilised, angiosperm embryo sac at maturity is 8 nucleate and 7-celled.

Reason (R): The egg apparatus has 2 polar nuclei. In the light of the above statements, choose the correct answer from the options given below:

1. A. Both A and R are true and R is the correct explanation of A
2. B. Both A and R are true but R is NOT the correct explanation of A
3. C. A is true but R is false (Correct answer)
4. D. A is false but R is true

Correct Answer

Option C — A is true but R is false

Detailed Solution & Explanation

The correct answer is A is true but R is false.

Key Points

• A mature angiosperm embryo sac is 8-nucleate and 7-celled — so Assertion A is correct.
• The egg apparatus (at the micropylar end) consists of two synergids and one egg cell — it does not contain the polar nuclei. The 2 polar nuclei lie in the central cell, so Reason R is false.