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-$I$ (Pre-fertilization)	Column-$II$ (Post-fertilization)
$P$. Ovule	$I$. Fruit
$Q$. Integument	$II$. Embryo
$R$. Ovary	$III$. Seed
$S$. Ovary wall	$IV$. Pericarp
$T$. Zygote	$V$. Seed coat

Column-$I$	Column-$II$
$(A)$ Clone	$(1)$ Agamospermy
$(B)$ Plant apomixis	$(2)$ Scion
$(C)$ Grafting	$(3)$ Callus
$(D)$ Tissue culture	$(4)$ Flower
$(E)$ Inflorescence	$(5)$ Ramet

$A$: 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.

Similar Questions

Match the following columns:
Column-$I$ (Pre-fertilization) Column-$II$ (Post-fertilization)
$P$. Ovule $I$. Fruit
$Q$. Integument $II$. Embryo
$R$. Ovary $III$. Seed
$S$. Ovary wall $IV$. Pericarp
$T$. Zygote $V$. Seed coat

Match the following columns:

Column-$I$ Column-$II$

$(A)$ Clone $(1)$ Agamospermy

$(B)$ Plant apomixis $(2)$ Scion

$(C)$ Grafting $(3)$ Callus

$(D)$ Tissue culture $(4)$ Flower

$(E)$ Inflorescence $(5)$ Ramet

Select the incorrect statement.

Statement $P$: Seeds of some plants like orchids do not contain stored food.
Statement $Q$: The embryo present in their seeds is extracted and grown in a culture medium.

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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.