A prothallus is
- a structure in pteridophytes formed before the thallus develops
- a sporophytic free living structure formed in pteridophytes
- a gametophyte free living structure formed in pteridophytes
- a primitive structure formed after fertilisation in pteridophytes.
Solution: Answer: CSolution: Prothallus is a small flattened multicellular structure that represent the independent gametophyte generation in pteriodophytes, e,g., club mosses, horsetails and ferns. In some of the pteridophytes a single prothallus bears both male and female sex organs. In others, there are separate male and fenale prothalli.