Sex organs are embedded in the thallus in

Fern

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Riccia

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Azolla

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None of the above

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Solution

The correct option is B Riccia
Riccia belongs to the genus liverworts. The gametophytic plant body of Riccia is a branched dorsiventral thallus. The sex organs antheridia and archegonia are embedded in the thallus. The antheridium is embedded in an antheridial chamber that opens on the dorsal side of the thallus. The archegonium is linked to the thallus by a stalk. Thus the correct answer is option B.

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