microspore sentence in Hindi
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- These microspore mother cells, also called microsporocytes, then undergo meiosis and become four microspore haploid cells.
- These microspore mother cells, also called microsporocytes, then undergo meiosis and become four microspore haploid cells.
- Plants with heterosporous life cycles using microspores and megaspores arose independently in several plant groups during the Devonian period.
- In heterosporous organisms, two types of spores exist : microspores give rise to males and megaspores to females.
- In megasporogenesis, often three of the four spores degenerate after meiosis, whereas in microsporogenesis all four microspores survive.
- For example, in flowering plants, microspores ultimately produce microgametes ( sperm ) and megaspores ultimately produce megagametes ( eggs ).
- Microspores are structures that are part of the alternation of generations in many seedless vascular cryptogams, all gymnosperms and all angiosperms.
- In organisms that are heterosporous, two types of spores occur : Microsporangia produce male microspores, and megasporangia produce female megaspores.
- In gymnosperms, such as conifers, microspores are produced through meiosis from microsporocytes in pollen sacs, which contain the microsporocytes.
- In heterosporous vascular plants ( plants that produce both microspores and megaspores ), the gametophyte develops endosporically, within the spore wall.
- Some of the cells grow into nutritive cells that supply nutrition for the microspores that form by meiotic division from the sporogenous cells.
- After the formation of the four microspores, which are contained by callose walls, the development of the pollen grain walls begins.
- Inside the sporocarp, the modified leaflets bear several "'microsporangia, each of which will produce many small male microspores.
- "' Microspores "'are land plant spores that develop into male gametophytes, whereas megaspores develop into female gametophytes.
- During meiosis, a diploid microspore mother cell undergoes two successive meiotic divisions to produce 4 haploid cells ( microspores or male gametes ).
- During meiosis, a diploid microspore mother cell undergoes two successive meiotic divisions to produce 4 haploid cells ( microspores or male gametes ).
- The " in vitro " methods include gynogenesis ( ovary and flower culture ) and androgenesis ( anther and microspore culture ).
- Microspores, which will divide to become pollen grains, are the " male " cells and are borne in the stamens ( or microsporophylls ).
- It is a dioecious species with male specimens that have microspores dispersed from cones of ovoid shaped terminals, 120 mm long and 80 mm wide.
- Within the stamen the microsporangium forms grains of "'pollen "', surrounded by the protective microspore, which forms the male gametophyte.
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