Question

Assertion : During embryo development in dicots, suspensor serves as the main nutritive tissue for the embryo.
Reason: The last cell of the suspensor at the end adjacent to the embryo is known as haustorium.

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

Answer 1

Answer: (D)

During embryo development in dicots, the suspensor cell divides transversely a few times to produce a filamentous suspensor of 6-10 cells. The first cell of suspensor towards the micropylar end becomes swollen and functions as haustorium whereas the last cell of suspensor at the end adjacent to the embryo is known as hypophysis. The function of the suspensor is to anchor the embryo to the embryo sac and push it deep into the endosperm so that the embryo lies in a nutritionally favourable environment.