A: Growth of the male gametophyte is complete | vedclass

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Question

(A) In angiosperms,the pollen grain represents the partially developed male gametophyte. It is typically released from the anther at the $2$-celled st

Vedclass · Accepted Answer

Assertion and Reason both are correct and Reason is the correct explanation of Assertion.

Vedclass · Answer

(A) In angiosperms,the pollen grain represents the partially developed male gametophyte. It is typically released from the anther at the $2$-celled stage (vegetative cell and generative cell) in about $60\%$ of angiosperms. Since the development is only partial at the time of release,the remaining growth of the male gametophyte (including the formation of the pollen tube and the division of the generative cell into two male gametes) occurs on the stigma of the female reproductive organ. Therefore,both the Assertion and the Reason are correct,and the Reason correctly explains why the growth must be completed on the female reproductive organ.

Column-$I$	Column-$II$
$A$. Tapetum	$i$. Degenerate during development
$B$. Intine	$ii$. Resistant organic materials
$C$. Vegetative cell	$iii$. Pollen tube
$D$. Sporopollenin	$iv$. Provide nourishment to pollen grains

$A$: Growth of the male gametophyte is completed over the female reproductive organ.
$R$: The $2$-celled stage of the partial male gametophyte is developed in-situ.

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Make the correct pair:

Column-$I$ Column-$II$

$A$. Tapetum $i$. Degenerate during development

$B$. Intine $ii$. Resistant organic materials

$C$. Vegetative cell $iii$. Pollen tube

$D$. Sporopollenin $iv$. Provide nourishment to pollen grains

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$A$: Growth of the male gametophyte is completed over the female reproductive organ.$R$: The $2$-celled stage of the partial male gametophyte is developed in-situ.