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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
Population Regulation The number of individuals in a natural population varies with time. If the size of a population declines too drastically due to some reason, it may becom
Q. Which cell organelles are well-developed in secretory cells? In secretory cells, like the secretory cells of endocrine glands, organelles related to production, "exportation
Define Spiral cleavage in brief. Pattern of cell division in the developing embryo where products of the cell divisions shift by rotating either counterclockwise or clockwise s
Define Role of Glucose-6-phosphate dehydrogenase - Gene Expression? Glucose-6-phosphate dehydrogenase (G6PD) is another enzyme involved in lipogenesis that is regulated by diet
Special type of Wards: Additional accommodation or differences in size and shape of some of the special type of wards e.g. Intensive Care Ward, Infectious diseases ward and
Chemoreceptors These are receptors included in perception of chemical stimuli. You will see that there are three kinds of Chemoreceptors among metazoans: i) Those concerne
State the term - Aneurysms Aneurysms are vascular dilations resulting from localised defects in the elasticity of a vessel. They can be visualised as balloon like expansions of
how many types of respiration are?define them also
Explain about thiol proteases Group of thiol proteases, similar in structure to each other, are found in plants. These include papain from the papaya fruit and ficain from f
Determination of Limb Polarities The limb pattern is characterized by three axes (or polarities) as displayed in diagram: (1) The direction from the shoulder (or hip) to t
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