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Yogita Ingle 6 years, 3 months ago
Sporogenous tissue is the compactly arranged homogenous cell in the microsporangium found in young anther. During the development of microsporangium each cell of sporogenous tissue differentiated into microspore mother cell or pollen mother cell. Each microspore mother cell undergoes meiosis and gives rise to haploid microspore.
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Meghna Thapar 5 years, 8 months ago
A genome size of 430 Mb nonetheless represents a daunting task for whole genome sequencing. The rice genome is 3.5 times the size of the Arabidopsis genome and the third largest public genome project undertaken to date, behind the human and mouse genomes. Rice (Oryza sativa) is one of the most important crops in the world. ... The rice genome is 3.5 times the size of the Arabidopsis genome and the third largest public genome project undertaken to date, behind the human and mouse genomes.
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Yogita Ingle 6 years, 3 months ago
As the anther develops, the cells of the sporogenous tissue undergo meiotic divisions to form microspore tetrads. As each cell of the sporogenous tissue is capable of giving rise to a microspore tetrad. Each one is a potential pollen or microspore mother cell (PMC). The process of formation of microspores from a pollen mother cell through meiosis is called microsporogenesis. The microspores, as they are formed, are arranged in a cluster of four cells–the microspore tetrad. As the anthers mature and dehydrate, the microspores dissociate from each other and develop into pollen grains. Inside each microsporangium several thousands of microspores or pollen grains are formed that are released with the dehiscence of anther.
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Gaurav Seth 6 years, 4 months ago
Geitonogamy − It is the transfer of pollens from the anther of one flower to the stigma of another flower in thesame plant. Genetically, it is similar toautogamy, but it requires pollinating agents. Xenogamy − It is the transfer of pollen grains from the anther to thestigma of a different plant.
Difference- In geitonogamy pollen grains from one flower are transferred to the stigma of another flower on the same plant whereas in xenogamy the pollen grains are transferred to the stigma of a flower on another plant(of the same species) genetically similar , genetically different Similarity -In both types of pollination pollen grains from the anther are transferred to the stigma of another flower of the same species
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Meghna Thapar 5 years, 6 months ago
Cow dung demonstrated a potential for biogas generation. Biogas is a mixture of colourless, flammable gases obtained by the anaerobic digestion of plant-based organic waste materials. Biogas is typically made up of methane (50-70%) carbon dioxide (30-40%) and other trace gases. Many microorganisms affect anaerobic digestion, including acetic acid-forming bacteria (acetogens) and methane-forming archaea (methanogens). These organisms promote a number of chemical processes in converting the biomass to biogas. Gaseous oxygen is excluded from the reactions by physical containment.
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Meghna Thapar 5 years, 8 months ago
Eutrophication can have serious effects, like algal blooms that block light from getting into the water and harm the plants and animals that need it. If there's enough overgrowth of algae, it can prevent oxygen from getting into the water, making it hypoxic and creating a dead zone where no organisms can survive. The most common nutrients causing eutrophication are nitrogen and phosphorus. The main source of nitrogen pollutants is run-off from agricultural land, whereas most phosphorus pollution comes from households and industry, including phosphorus-based detergents. Oxygen depletion, or hypoxia, is a common effect of eutrophication in water. The direct effects of hypoxia include fish kills, especially the death of fish that need high levels of dissolved oxygen. Changes in fish communities may have an impact on the whole aquatic ecosystem and may deplete fish stocks.
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Bhawna Pal 6 years, 3 months ago
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