Contrivances for self-pollination are:

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(D) Self-pollination (autogamy) is facilitated by several mechanisms in plants:$1$. Bisexuality: The presence of both male (stamen) and female (pistil

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All of these

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(D) Self-pollination (autogamy) is facilitated by several mechanisms in plants:$1$. Bisexuality: The presence of both male (stamen) and female (pistil) reproductive organs in the same flower.$2$. Homogamy: The maturation of both anthers and stigma at the same time,which ensures that pollen can fertilize the stigma of the same flower.$3$. Cleistogamy: $A$ condition where flowers remain closed,forcing self-pollination to occur within the closed bud.Since all these mechanisms promote self-pollination,the correct answer is $D$.

Column-$I$	Column-$II$
$P$. Fungal diseases	$I$. Tobacco mosaic
$Q$. Bacterial diseases	$II$. Black rot of crucifers
$R$. Viral diseases	$III$. Brown rust of wheat
	$IV$. Turnip mosaic
	$V$. Red rot of sugarcane
	$VI$. Late blight of potato

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Match the following columns:
Column-$I$ Column-$II$
$P$. Fungal diseases $I$. Tobacco mosaic
$Q$. Bacterial diseases $II$. Black rot of crucifers
$R$. Viral diseases $III$. Brown rust of wheat
$IV$. Turnip mosaic
$V$. Red rot of sugarcane
$VI$. Late blight of potato

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