Question

Select a set of heterosporous genera.

• A. Marsilea, Azolla
• B. Salvinia, Pteridium
• C. Adiantum, Azolla
• D. Pteris, Lycopodium

Answer 1

The correct option is A Marsilea, Azolla

Heterosporous ferns are those ferns which produce two types of spores, small and large. In this, the small male spores form gametophytes that develop antheridia and the larger female spores form gametophytes that develop archegonia. The male spores are called as microspores and female spores are called as megaspores. Examples of ferns which are heterosporous include Marsilea, Salvinia, and Azolla. Homosporous ferns are those ferns which produce only one type of spore. Examples of ferns which are homosporous include Pteridium, Adiantum, Pteris, Lycopodium.

Thus, the correct answer is 'Marsilea, Azolla.'