Question

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): A typical unfertilized, 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:

• A. Both A and R are true but R is NOT the correct explanation of A
• B. A is true but R is false
• C. A is false but R is true
• D. Both A and R are true and R is the correct explanation of A

Hint:

In angiosperms, the egg apparatus consists of the egg cell and two synergids. The polar nuclei, which are found in the central cell of the embryo sac, fuse during fertilization to form the secondary nucleus.

Answer 1

The Correct Option is A

Let's evaluate both statements: Assertion (A): The statement that a typical unfertilized, angiosperm embryo sac is 8-nucleate and 7-celled is correct. The embryo sac typically has 8 nuclei, with 7 cells, including the egg cell and the two synergids, along with other cells like the central cell containing two polar nuclei. Reason (R): The statement that the egg apparatus has 2 polar nuclei is true, but it is unrelated to the structure described in the Assertion. The egg apparatus consists of the egg cell and two synergids, while the polar nuclei are part of the central cell in the embryo sac. Thus, both statements are true, but Reason (R) does not correctly explain Assertion (A).