Question

Assertion: A typical angiosperm embryo sac is 8-nucleate and 7-celled.
Reason: The large central cell of embryo sac has three polar nuclei.

• A. Both assertion and reason are true and reason is the correct explanation of assertion.
• B. Both assertion and reason are true but reason is not the correct explanation of assertion.
• C. The assertion is true but reason is false.
• D. Both assertion and reason are false.

Answer 1

The correct option is C The assertion is true but reason is false.


The mature embryo sac has three cells called antipodals at the chalazal end and three cells at micropylar end constituting the egg apparatus. Each of these cells consists one nuclei.
The egg apparatus consists of two synergids and one egg cell.
There is one large central cell present which consists of two polar nuclei.
Hence embryo sac has 7 cells and eight nuclei.

The assertion is true and reason is false.