Kidney- shaped covering of Dryopteris sori is

Ramentum

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Placenta

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Indusium

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Sporophyll

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Solution

The correct option is C Indusium
Dryopteris species can be identified by the circular shaped sori, that is covered by a kidney-shaped, translucent tissue. It is called as indusium. It is a shield like outgrowth of the leaves.

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