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  • In the following questions, a statement of assertion (A) is followed by a statement of reason (R)  (1) If both Assertion & Reason are true and the reason is t

In the following questions, a statement of assertion (A) is followed by a statement of reason (R) 

(1) If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark A
(2) If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark B
(3) If Assertion is true statement but Reason is false, then mark C
(4) If both Assertion and Reason are false statements, then mark D
 

Assertion: A triploid primary endosperm nucleus (PEN) is created when the second male gamete approaches the two polar nuclei that are present in the central cell.

Reason: Due to the fact that an embryo sac undergoes two different types of fusions—syngamy and triple fusion—the occurrence is known as double fertilisation.

Option: 1

A


Option: 2

B


Option: 3

C


Option: 4

D


Answers (1)

best_answer

Both Assertion & Reason are true and the reason is the correct explanation of the assertion. 

The pollen tube discharges the two male gametes into the cytoplasm of the synergid after penetrating one of them. The syngamy is completed when one of the male gametes approaches the egg cell and unites with its nucleus. As a result, the zygote, a diploid cell, is created. A triploid primary endosperm nucleus (PEN) is created when the second male gamete merges with the two polar nuclei that are present in the central cell (Figure 2.13a). Triple fusion is the term used for this process because three haploid nuclei are fused together. 

Option 1  is the correct answer. 

Posted by

Ritika Jonwal

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