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

Both statements are presented for evaluation:Assertion (A): It is accurate to state that a typical unfertilized angiosperm embryo sac possesses 8 nuclei and is structured into 7 cells. This structure commonly includes 8 nuclei and 7 cells, comprising the egg cell, two synergids, and other cells such as the central cell which encloses two polar nuclei.Reason (R): The assertion that the egg apparatus contains 2 polar nuclei is factually correct. However, this statement lacks relevance to the structural description provided in the Assertion. The egg apparatus is comprised of the egg cell and two synergids. The polar nuclei, conversely, are located within the central cell of the embryo sac.Consequently, while both statements are factually accurate, Reason (R) does not provide a valid explanation for Assertion (A).