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Oogenesis
Oogenesis is the formation of ovum from oogonial cells that are formed in the ovary from primordial germ cells. And as in spermatogenesis it involves meiosis to produce haploid ovum. You have learnt in the section on spermatogenesis that the differentiation of sperm occurs after the meiotic events. In oogenesis the process of first meiotic division is very prolonged; and it is during this process that growth and differentiation of oocyte take place. In many animals most events related to oocyte differentiation occur during prophase I of first meiotic division. In animals which produce yolk-laden eggs, this phase is divided into
What is Primary Growth in Shoot? The growth in height of a plant stem results from the division of cells at the apex, or tip of the stem, called the shoot tip. Here, a group o
Explain the Composition of Blood Agar? Infusion from beef heart - 500 gm Tryptose - 10.0 gm Sodium Chloride - 5.0 gm Agar - 15 gm Distilled water - 1000 ml pH
Maximum and minimum range of an animal with the factors of Ph Salinity Pressure Relative human
What is the Nature of Monosaccharides? Monosaccharides are colourless, crystalline substances which are soluble in water but insoluble in non polar solvents. Monosaccharides ca
Define Excretion of toxins and Act as precursors? Excretion of toxins: Glucuronic acid, a metabolite of glucose, combines with chemical and bacterial toxins and some normal met
Name two possible why the number of live bacteria cell have reached the stationary growth by 60hrs and start to die off after 12hrs?
Q. Is fecundation in amphibians internal or external? In this aspect are amphibians evolutionarily proximal to fishes or to reptiles? In the majority of the amphibian species f
Define Changes in Gluten Proteins during Dough Formation? Initially, gluten is formed when flour and water are mixed together. The proteins in the flour, glutenin and gliadin c
Q. Describe Bentham and Hookers System? Bernard de Jussieu (1699-1776) tried to classify the plants in Royal Garden, Paris. During this exercise he developed a system of classi
What is Biochemical Composition As life evolved on this planet, nature selected only a few elements, and life eventually came to be based essentially on carbon compounds. Out o
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