WebA prothallus, or prothallium, (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. In lichens it refers to the region of the thallus that is free of algae.. The prothallus develops … WebProthalli are usually bisexual and antheridia form earlier than archegonia. Lingulate, strap-like and branched prothalli easily grow on the crowded improved Knop's agar media, which produce ... morphology of the fern gametophyte can be of service in understanding different phyletic groups (Bower, 1923-1928; Stokey, 1951). The details of
Fern Reproduction
http://www.biologyclermont.info/wwwroot/courses/lab2/mosses%20intro.htm WebThe fern life cycle includes a haploid gametophyte that is independent of the sporophyte and functions to produce the gametes. In homosporous ferns, the sex of the gametophyte is not fixed but can vary depending … aims absa call centre
What is the gametophyte of a fern? What purpose …
WebFern Gametophytes Fern spores drop to the ground and germinate to form the separate, free-living gametophyte generation (fig. 22.26 on pg. 22-26). An association with water is needed for these delicate structures to survive and for the motile sperm to effect fertilization. Your TA will lead a discussion of the structure of fern gametophytes. 16. WebA) female sporophyte B) male gametophyte C) female gametophyte D) male sporophyte 14) 15) Gymnosperms differ from both extinct and extant (living) ferns because they A) have macrophylls. B) have spores. C) are woody. D) have pollen. E) have sporophylls. 15) 16) Generally, wind pollination is most likely to be found in seed plants that grow A ... Web-gametophyte always smaller, nutritionally independent -sperm in antheridia, motile sperm-single egg in archegonia -require free water for fertilization . is the sporophyte diplid phase or haploid phase? diploid phase. what stage dominates the SVP. sporophyte stage. aims accreditation degrees