The gametophyte is called prothallus in (1) Pteridophyta (2) Bryophyta (3) Sperrnatophyta (4) Thallophyta

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(1) Pteridophyta Explanation: Prothallus is usually the gametophyte stage in the life of a fern or other pteridophyte. The prothallium develops from a germinating spore. It is a short-lived and inconspicuous heart-shaped structure.

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