Which of the following statements is correct?

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(D) In Pteridophytes,the gametophyte (prothallus) is small but multicellular,free-living,and mostly photosynthetic. Some Pteridophytes like Selaginell

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The precursor of seed habit is found in Pteridophytes.

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(D) In Pteridophytes,the gametophyte (prothallus) is small but multicellular,free-living,and mostly photosynthetic. Some Pteridophytes like Selaginella exhibit heterospory,which is considered a precursor to the seed habit. Option $A$ is incorrect because the prothallus is the gametophyte itself,not a stage within it. Option $B$ is incorrect because the female gametophyte in Gymnosperms is retained within the megasporangium and is not free-living. Option $C$ is incorrect as these structures are typically associated with Bryophytes (like Marchantia). Therefore,option $D$ is the correct statement.

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