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Question

Sporangia are found in fruiting structures, called as sporocarps in aquatic ferns. Which of the following is aquatic fern?

A
Azolla
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B
Selaginella
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C
Pteridium
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D
Equisetum
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Solution

The correct option is A Azolla
Azolla is an aquatic fern consisting of a short, branched, floating stem, bearing roots, which hang down in the water. The leaves are alternately arranged and each consists of a thick aerial dorsal lobe containing green chlorophyll and a thin floating ventral lobe of slightly larger size, that is colourless. Under certain conditions, an anthocyanin pigment gives the fern a reddish-brown colour.

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