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Solution


Q.

Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R).                   [2025]

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 Both A and R are true and R is the correct explanation of A  
2 Both A and R are true but R is NOT the correct explanation of A  
3 A is true but R is false  
4 A is false but R is true  

Ans.

(3)

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

Polar nuclei are situated below the egg apparatus in the large central cell.

Three cells are grouped together at micropylar end and constitute the egg apparatus.

Hence, A is true but R is false.