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The pteridophyte showing heterospory is options 1.lycopodium2.selaginella3.pteris4.dryopteris​

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ginellaExplanation:HETEROSPORY is shown by selaginella and Salvinia.This produces two different kinds of spores, thus it is more advanced than most of the members in its group.The two different kinds of spores are megaspores formed from megasporangia and microspores formed from microsporangia.Microspores PRODUCE male GAMETOPHYTE while MEGASPORE produces female gametophyte.Heterospory is essential for seed habit.Retention of gametophyte inside the sporophyte is a PRECURSOR for the seed habit.



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