NEET · Biology · STD 12 - 1. sexual reproduction in flowering plants
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 :
- 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
Answer & Solution
Correct Answer
(C) A is true but \(R\) is false
Step-by-step Solution
Detailed explanation
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.
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.
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