Which one of the following is heterosporous?

Options

(a) Dryopteris
(b) Salvinia
(c) Adiantum
(d) Equisetum

Correct Answer:

Salvinia

Explanation:

Salvinia is an aquatic fern with both annual and perennial species- b is heterosporous i.e. with two types of spores, microspores and megaspores