alternation of generations वाक्य
उदाहरण वाक्य
मोबाइल
- Reproduction in this species is by an alternation of generations between an asexual polygastric animal ( bearing both asexual and reproductive elements ) and the sexual eudoxid stage which becomes detached from the nectophore.
- Initially, Chamisso and Steenstrup described the succession of differently organized generations ( sexual and asexual ) in animals as " alternation of generations ", while studying the development of tunicates, cnidarians and trematodes.
- Alternation of generations occurs in almost all multicellular red and green algae, both freshwater forms ( such as " Cladophora " ) and seaweeds ( such as " Red algae : Reproduction.
- In common with all ferns, " T . boschianum " exhibits a gametophyte stage in its life cycle ( alternation of generations ) and develops a haploid reproductive prothallus as an independent plant.
- In common with all ferns, " H . tunbrigense " exhibits a gametophyte stage in its life cycle ( alternation of generations ) and develops a haploid reproductive prothallus as an independent plant.
- As Bateman and Dimichele say " [ . . . ] the alternation of generations has become a terminological morass; often, one term represents several concepts or one concept is represented by several terms ."
- This initiated the new field of comparative morphology which, largely through the combined work of Frederick Bower, Eduard Strasburger and others, established that an " alternation of generations " occurs throughout the plant kingdom.
- Reproduction in " Muggiaea kochii " is by an alternation of generations between an asexual polygastric form ( bearing both asexual and reproductive elements ) and the sexual eudoxid form which becomes separated from the nectophore.
- It also should be borne in mind that every sexually reproducing extant species of vascular plant actually has an alternation of generations; the plants we see about us generally are megagametophytes ( the embryo sacs in the ovules ).
- In his " " of 1851 Wilhelm Hofmeister ( 1824 1877 ) starting with the ferns and bryophytes demonstrated that the process of sexual reproduction in plants entails an " alternation of generations " between sporophytes and gametophytes.
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