Question

The heart shaped form of prothallus in homosporous species of pteridophytes represents

• A. dioecious gametophyte stage
• B. monoecious sporophyte stage
• C. monoecious gametophyte stage
• D. dioecious sporophyte stage

Answer 1

The correct option is C monoecious gametophyte stage

Prothallus is the heart shaped haploid structure that represents the gametophytic stage of pteridophytes. Most pteridophyte species are homosporous, i.e, produce same type of spores. Generally, the prothalli of homosporous pteridophytes are monoecious, i.e, they bear both male and female reproductive organs.
Thus, the heart shaped form of prothallus in homosporous species of pteridophytes represents monoecious gametophyte stage.