Question

Pick out the correct group consisting of all genera exhibiting homospory

• A. Salvinia, Pteris, Lycopodium, Selaginella
• B. Equisetum, Psilotum, Lycopodium, Pteris
• C. Equisetum, Pteris, Salvinia, Psilotum
• D. Lycopodium, Psilotum, Selaginella, Equisetum

Answer 1

The correct option is B Equisetum, Psilotum, Lycopodium, Pteris

Heterospory is a phenomenon in which two kinds of spores are borne by the same plant. These spores differ in size. The smaller one is known as microspore and the larger one is known as megaspore. The microspore germinates to form the male gametophyte and the megaspore germinates to form the female gametophyte.

Homospory is the production of a single type of spores. It occurs in seedless, vascular plants (such as the club mosses and horsetails) . The homospore germinates to produce a bisexual gametophyte.

Pteridophytes, may produce similar spores (homosporous) or dissimilar spores (heterosporous). Selaginella and Salvinia show heterospory.

So, the correct answer is "Equisetum, Psilotum, Lycopodium, Pteris"