Question

Identify the pair of heterosporous pteridophytes among the following:

Options

• Selaginella and Salvinia

• Psilotum and Salvinia

• Equisetum and Salvinia

• Lycopodium and Selaginella

Answer 1

Selaginella and Salvinia

Explanation:

Microspores and megaspores are the two types of spores produced by heterosporous pteridophytes. Megaspores produce female gametophytes, whilst microspores germinate to produce male gametophytes. Heterosporous pteridophytes include Selaginella and Salvinia. Two different kinds of spores are produced by the sporophyte in the genus Selaginella of club mosses. Salvinia, a genus of floating aquatic ferns, is heterosporous, like Selaginella.