(C) The correct answer is $C$. In bryophytes and pteridophytes,fertilization is dependent on water. The movement of male gametes (antherozoids) toward

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Archegonia of $Pteris$ secrete a chemical substance which attracts sperms of $Pteris$ chemotactically

(C) The correct answer is $C$. In bryophytes and pteridophytes,fertilization is dependent on water. The movement of male gametes (antherozoids) towards the archegonia is a chemotactic response. Archegonia of $Pteris$ secrete specific chemical substances,primarily malic acid,which act as a chemoattractant. This chemical specifically attracts the sperms of $Pteris$ through chemotaxis,ensuring species-specific fertilization.

Class 11 Biology Plant Kingdom Mix Examples- Plant Kingdom

Medium

When the sperms of $Funaria$ and $Pteris$ are put together near the archegonia of $Pteris$,only the sperms of $Pteris$ readily enter the archegonia and reach the egg. The reason being that

AIPMT 1994 All AIPMT

AIPMT 1989 All AIPMT

A
Sperms of $Funaria$ are killed when mixed with sperms of $Pteris$
B
Archegonia of $Pteris$ secrete a substance which repels sperms of $Funaria$
C
Archegonia of $Pteris$ secrete a chemical substance which attracts sperms of $Pteris$ chemotactically
D
Sperms of $Funaria$ are less motile