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Q.

Prothallus of fern has

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a

Antheridia and archegonia on lower surface

b

Antherida on upper surface and archegonia on lower surface

c

Antheridia and archegonia on upper surface

d

Antheridia on lower surface and archegonia on upper surface.

answer is D.

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Detailed Solution

The spores germinates when the conditions are favourable. It divides and forms a mature gametophyte which is  a green flat structure is known as prothallis. Prothallus of fern has antheridia on lower surface and archegonia on upper surface.

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