The spore of a fern represents:

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(B) In the life cycle of ferns,the main plant body is a sporophyte $(2n)$.It produces spores through meiosis within the sporangia.Since these spores a

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Gametophytic stage

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(B) In the life cycle of ferns,the main plant body is a sporophyte $(2n)$.It produces spores through meiosis within the sporangia.Since these spores are produced via meiosis,they are haploid $(n)$.These haploid spores germinate to form the prothallus,which is the independent gametophytic stage of the fern.Therefore,the spore represents the beginning of the gametophytic stage.

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