Which of the following pteridophytes is heterosporous in nature?

Psilotum

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Adiantum

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Equisetum

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Salvinia

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Solution

The correct option is D Salvinia
Within the sporangia, the spore mother cell undergoes meiosis to form spores. If all the spores are of the same kind the plant is said to be homosporous (Lycopodium, Psilotum, Adiantum, Equisetum and Dryopteris), and if they are of two different kinds (macro and micro), the plant is called heterosporous (Selaginella, Isoetes, Marsilea, Azolla and Salvinia).

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