In Funaria and Pteris,both sperms are release | vedclass

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Question

(D) Fertilization in bryophytes and pteridophytes is dependent on water. In $Pteris$ (a pteridophyte),the archegonium secretes specific chemical subst

Vedclass · Accepted Answer

$Pteris$ archegonium secretes chemicals that attract only $Pteris$ sperms.

Vedclass · Answer

(D) Fertilization in bryophytes and pteridophytes is dependent on water. In $Pteris$ (a pteridophyte),the archegonium secretes specific chemical substances (chemotaxis) that attract the male gametes (antherozoids) of its own species. This is a specific biological mechanism where the female sex organ recognizes and attracts only the compatible male gametes through chemical signaling. Therefore,even if $Funaria$ sperms are present,they are not attracted to the $Pteris$ archegonium.

Column $I$	Column $II$
$A$. Glycogen	$t$. Agaricus
$B$. Pyrenoids	$s$. Spirogyra
$C$. Laminarin and mannitol	$p$. Sargassum
$D$. Floridean starch	$r$. Polysiphonia

Column $I$	Column $II$	Column $III$
$1$. Phycocyanin	$p$. Brown algae	$x$. Batrachospermum
$2$. Phycoerythrin	$q$. Blue-green algae	$y$. Sargassum
$3$. Fucoxanthin	$r$. Red algae	$z$. Nostoc

In $Funaria$ and $Pteris$,both sperms are released near the archegonium of $Pteris$. Only $Pteris$ sperms enter the archegonium because:

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Match the following columns correctly:

Column $I$ Column $II$ Column $III$

$1$. Phycocyanin $p$. Brown algae $x$. Batrachospermum

$2$. Phycoerythrin $q$. Blue-green algae $y$. Sargassum

$3$. Fucoxanthin $r$. Red algae $z$. Nostoc

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