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

Sperms of Funaria are killed when mixed with sperms
of Pteris

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Archegonia of Pteris secrete a substance with repels
sperms of Funaria

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Archegonia of Pteris secrete a chemical substance which
attracts sperms of Pteris thermostatically

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Sperms of Funaria are less motile

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Solution

The correct option is C Archegonia of Pteris secrete a chemical substance which
attracts sperms of Pteris thermostatically
Because archegonia of pteris secrete a chemical malic acid which attracts only sperms of Pter!s thermostatically.

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Similar questions

Sperms of both Funaria and Pteris were released together near the archegonia of Pteris. Only the sperms of Pteris enter the archegonia because,

List-I	List-II
(A) Sex hormone	(I) Fertilization in Funaria
(B) Cell wall breaking enzyme	(II) Formation of zygophores in Rhizopus
(C) Sugary mucilaginous substance	(III) Formation of buds in Funaria
(D) Naturally occurring growth factor	(IV) Fertilization of Pteris
	(V) Conjugation in Spirogyra

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