BIOLOGICAL CLASSIFICATION
KINGDOM PLANTAE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which plant is heterosporous?
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Lycopodium sp.
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Marchantia sp.
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Selaginella sp.
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None of the above
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Explanation:
Detailed explanation-1: -The main plant body is a diploid sporophyte and is differentiated into true roots, stem and leaves. Selaginella is heterosporous, i.e. it produces two kinds of spores; microspores and megaspores. Spores are haploid and produced by meiosis in the spore mother cells. Spores germinate into male and female gametophytes.
Detailed explanation-2: -Lycopodium is homosporous–all spores are roughly equal in size. Selaginella and Isoetes are heterosporous–spores are of two distinct sizes, microspores and megaspores.
Detailed explanation-3: -Selaginella and Salvinia are heterosporous.
Detailed explanation-4: -Final answer: The heterosporous pteridophytes are Selaginella and Salvinia.
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