In the prothallus of Dryopteris (fern),the se | vedclass

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(A) The prothallus of a fern $(Dryopteris)$ is a heart-shaped,photosynthetic,independent gametophyte.It is monoecious,meaning it bears both male and f

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Antheridia and archegonia on the lower surface

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(A) The prothallus of a fern $(Dryopteris)$ is a heart-shaped,photosynthetic,independent gametophyte.It is monoecious,meaning it bears both male and female sex organs.The sex organs,namely the antheridia (male) and archegonia (female),are typically found on the ventral (lower) surface of the prothallus.This location helps in the protection of the reproductive structures and facilitates fertilization,as the antherozoids require a film of water to swim towards the archegonia.

In the prothallus of $Dryopteris$ (fern),the sex organs are located as follows:

Similar Questions

The formation of a sporophyte (fern) from a gametophyte (prothallus) without fertilization is known as .......... .

Assertion $(A)$: The sporophyte phase of ferns is long-lived and dominant.
Reason $(R)$: In ferns,the sporophyte phase exists as a thallus.

The female gametophyte in heterosporous ferns is:

The gametophyte of a fern bears

$A$ - Selaginella and Salvinia produce heterospores.
$R$ - Cones (strobili) are developed in Selaginella and Equisetum.

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