A prothallus isA structure in pteridophytes formed before the thallus . . . The prothallus is generally monoecious as it bears both male and female sex organs i e antheridia and archegonia respectively or it may be dioecious if male and female sex organs are present on different plants So, the correct answer is ' A gametophyte free living structure formed, in pteridophytes' Was this answer helpful?
Prothallus isGametophyte, monoecious and autotrophic present in . . . When a spore falls on a suitable soil, it germinates and forms a flat cordate, green, thalloid, non-vascular, free-living, inconspicuous, small, multicellular, independent gametophyte This gametophyte is known as prothallus It is present in pteridophytes The prothallus is monoecious (ferns) or dioecious (Selaginella) It bears sex organs i e , male antheridia and female archegonia They are
Short Answer. Comment on the lifecycle and nature of a fern prothallus. Nature of Fern Prothallus: The prothallus represents the haploid gametophytic generation It is a multicellular, independent, photosynthetic form that lives for a short duration The prothallus needs a cool, damp, and shady place to grow Due to its requirement of water for fertilization, pteridophytes are restricted to narrow geographical regions
Prothallus of the fern producesSporesConesBoth A and BGametes - Toppr The prothallus is the fern gametophyte It is a green, photosynthetic structure that is one cell thick, usually heart or kidney shaped, 3–10 mm long and 2–8 mm broad Prothallus of fern produces male and female gametes which after fertilization give rise to dioploid sporophyte which produces spores
Prothallus of Dryopteris is a . . . . . . . . . . . . . . . . . It bears archegonia on . . . Spore is uninucleate haploid spherical structure The spore germinates into gametophyte known as prothallus Prothallus has archegonia present on the ventral side Hence, the Prothallus of Dryopteris is a Gametophyte It bears archegonia on the ventral side So, the correct answer is 'Gametophyte, ventral'
How many structures listed below are diploid a typical fern . . . - Toppr The haploid gametophyte in the fern is reduced to a small but multi-cellular, inconspicuous, heart-shaped prothallus As archegonium is also a gametophytic body so it is also a haploid cell Rootstock cell is the underground part of the plant also referred to as rhizome or underground stem
The prothallus of fern isGreenDorsiventralHeart-shapedAll of . . . - Toppr Prothallus of fern is flat, green, autotrophic, cordate (heart shaped), dorsiventral, about 1 8 to 113 inch in size (5-l0mm), free living independent, nonvascular gametophyte Prothallium or prothallus is usually the gametophyte stage in the life cycle The prothallium develops from a germinating spore It is a short-lived structure, typically 2-5 millimeters wide, with a number of rhizoids
The prothallus representsGametophyte of fernSporophyte of . . . The prothallus produces a antheridia andarchegonia These are exosphoric, flat, green, autotrophic, cordate (heart-shaped), multicellular, short-lived, small reduced, dorsiventral, free living independent and nonvascular
Mention the ploidy of the following : protonemal cell of a moss . . . - Toppr Mention the ploidy of the following: (a) protonemal cell of a moss (b) primary endosperm nucleus in dicot (c) leaf cell of a moss; prothallus cell of a fern (d) gemma cell in Marchantia (e) meristem cell of monocot (f) ovum of a liverwort (g) zygote of a fern
A prothallus is - Toppr Prothallus is autotrophic, independent and free-living in nature The male and female sex organs can develop either on a single prothallus (monoecious) or on a different prothallus (dioecious) Hence, a prothallus is a gametophyte and free-living structure formed in pteridophytes Was this answer helpful?