Vascular plants, like fern, show alternation of generations. which represents a gametophyte in the life cycle of fern?
a. rhizomes
b. prothallus
c. sporangia

Prothallus represents a gametophyte in the life cycle of fern.

A prothallium, or prothallus (from Latin pro = forwards and Greek θαλλος (thallos) = twig) is usually the gametophyte stage in the life of a fern or other pteridophyte. Occasionally the term is also used to describe the young gametophyte of a liverwort or peat moss as well.

The correct answer between all the choices given is the second choice or letter B. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

your answer is "the 1950's"