Q.
Protonema is the juvenile filamentous gametophytic stage seen in the life cycle of
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a
Polytrichum
b
Marchantia
c
Fucus
d
Ectocarpus
answer is A.
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Detailed Solution
Polytrichum is an example of mosses. The predominant stage in the life cycle of a moss is the gametophyte which consists of two stages. The first stage is the juvenile protonema and second stage is the adult leafy gametophytic stage called gametophore.
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