Question: 115 Identify the pair of heterosporous pteridophytes among the following :
(1) Psilotum and Salvinia
(2) Equisetum and Salvinia
(3) Lycopodium and Selaginella
(4) Selaginella and Salvinia
Answer: Option (4)
Explanation:
Heterosporous pteridophytes produce two different types of spores, microspores and megaspores.
Selaginella is a heterosporous pteridophyte that produces microspores and
megaspores in separate sporangia.
Salvinia is an aquatic fern that is also heterosporous.
Psilotum, Equisetum, and Lycopodium are homosporous and produce only one type of spore.
Therefore, the correct pair of heterosporous pteridophytes is Selaginella and Salvinia.