The first stage of gametophyte in mosses is the protonema which :

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Develops directly from a spore

Is creeping, green branched and frequently non-filamentous stage

Both (a) and (b)

Is brown and non-photosynthetic

answer is A.

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Detailed Solution

Protonema it is a creeping, green, branched and frequently filamentous stage. It is a haploid, independent, gametophytic stage in the life cycle of mosses. It is produced from the spores and gives rise to new plants. Examples – Funaria, polytrichum .

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