How many of the following plants are heterosporous?
Dryopteris, Pteris, Adiantum, Selaginella,
Salvinia, Cycas, Pinus, Ginkgo
Text Solution
Verified by ExpertsHeterospory is the production of spores of two different sizes and types by the sporophytes of land plants.
Dryopteris, Pteris and Adiantum are homosporous ferns; they produce only one type of spore.
Selaginella and Salvinia are heterosporous pteridophytes; they produce two distinct types of spores (microspores and megaspores).
Cycas, Pinus and Ginkgo are seed plants and are also heterosporous; they produce microspores (pollen) and megaspores within ovules.
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