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Question

In gametophytic phase of mosses, the first stage is called ________ whereas the second stage is called ________.

A
protonema stage, thallus stage
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B
thallus stage, protonema stage
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C
protonema stage, leafy stage
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D
thallus stage, leafy stage
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Solution

The correct option is C protonema stage, leafy stage
Gametophytic phase of mosses consists of two stages - protonema stage and leafy stage.

The first stage is the protonema stage, which develops directly from a spore. It is a creeping, green, branched and frequently filamentous stage.

The second stage is the leafy stage, which develops from the secondary protonema as a lateral bud. They consist of upright, slender axes bearing spirally arranged leaves. They are attached to the soil through multicellular and branched rhizoids.

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