microsporogenesis वाक्य
उदाहरण वाक्य
मोबाइल
- Two basic types of microsporogenesis are recognised, simultaneous and successive.
- All of the species except the genera placed in Nartheciaceae express simultaneous microsporogenesis.
- The plants demonstrate simultaneous microsporogenesis, the microspores are tetrad, tetrahedral, or isobilateral.
- While there may be a continuum with intermediate forms, the type of microsporogenesis has systematic significance.
- Orchids have simultaneous microsporogenesis and inferior ovaries, two characters that are typical of the'lower Asparagales '.
- In simultaneous microsporogenesis meiotic steps I and II are completed prior to cytokinesis, whereas in successive microsporogenesis cytokinesis follows.
- In simultaneous microsporogenesis meiotic steps I and II are completed prior to cytokinesis, whereas in successive microsporogenesis cytokinesis follows.
- In megasporogenesis, often three of the four spores degenerate after meiosis, whereas in microsporogenesis all four microspores survive.
- Two differences between these two groups ( although with exceptions ) are : the mode of microsporogenesis and the position of the ovary.
- Plants in Nartheciaceae show successive microsporogenesis which is one of the traits indicating that the family is sister to all the other members included in the order.
- In a process called "'microsporogenesis "', four haploid microspores are produced from each diploid sporogenous cell ( microsporocyte, pollen mother cell or meiocyte ), after meiotic division.
- The'lower Asparagales'typically have simultaneous microsporogenesis ( i . e . cell walls develop only after both meiotic divisions ), which appears to be an apomorphy within the monocots, whereas the'core Asparagales'have reverted to successive microsporogenesis ( i . e . cell walls develop after each division ).
- The'lower Asparagales'typically have simultaneous microsporogenesis ( i . e . cell walls develop only after both meiotic divisions ), which appears to be an apomorphy within the monocots, whereas the'core Asparagales'have reverted to successive microsporogenesis ( i . e . cell walls develop after each division ).
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