spiral cleavage sentence in Hindi
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- The cleavage is holoblastic spiral cleavage as in other gastropods.
- Development proceeds as eggs undergo spiral cleavage.
- The chirality in gastropods appears in early cleavage ( spiral cleavage ) and the gene NODAL is involved.
- The presence of spiral cleavage in animals such as platyhelminths could be difficult to correlate with some phylogenies.
- Shelled embryos develop in the ovaries through spiral cleavage, to become infective larvae with 3 pairs of hooks.
- However, one unifying feature shared among spiralia is the pattern of cleavage in the early embryo known as spiral cleavage.
- Members of the molluscs, annelids, platyhelminths and nemerteans have all been shown to exhibit spiral cleavage in its classical form.
- Previously, spiral cleavage was thought to be unique to the Spiralia in the strictest sense animals such as molluscs and annelids which exhibit classical spiral cleavage.
- Previously, spiral cleavage was thought to be unique to the Spiralia in the strictest sense animals such as molluscs and annelids which exhibit classical spiral cleavage.
- Spiral cleavage, from which this group draws its name, is a pattern of early development found in most ( but not all ) members of the Lophotrochozoa.
- The authors found this surprising, since nemertines have spiral cleavage in the early stages of cell division and form a trochophore larva, while brachiopods have radial cleavage and a larva that shows no sign of having evolved from a trochophore.
- Other Lophotrochozoan phyla ( rotifers, brachiopods, phoronids, gastrotrichs, and bryozoans ) are also said to display a derived form of spiral cleavage in at least a portion of their constituent species, although evidence for this is sparse.
- With this new understanding of animal phylogeny, the presence of spiral cleavage in polyclad platyhelminths, as well as the more traditional Spiralia, has led to the hypothesis that spiral cleavage was present ancestrally across the Lophotrochozoa as a whole.
- With this new understanding of animal phylogeny, the presence of spiral cleavage in polyclad platyhelminths, as well as the more traditional Spiralia, has led to the hypothesis that spiral cleavage was present ancestrally across the Lophotrochozoa as a whole.
- Research from the 1970s onwards suggested they were deuterostomes, because of some features that were thought characteristic of deuterostomes : a three-part coelom; radial rather than spiral cleavage in the development of the embryo; and formation of the coelom by enterocoely.
- The zygote ( fertilised egg ) divides by spiral cleavage and grows by determinate development, The embryos of most taxa develop either directly to form family Hubrechtidae form a pilidium larva, which can capture unicellular algae and which Maslakova describes as like a deerstalker cap with the ear flaps pulled down.
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