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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
How membrane maintained impermeability to potassium At 1 AM, an impermeable membrane divides a 1 liter solution of 1M NaCl in the left compartment from a 1 liter solution havin
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Q. What is Supraventricular Arrhythmias? Such arrhythmia tend to be reduced by the vagal withdrawal accompanying the onset of exercise.This and wandering pacemakers tend to rec
Classification of Enzymes : Enzymes are classified into the following six main categories in according with the nature of reaction the catalyze: 1. Oxidoreductases
Spermatogenesis In multicellular organisms the reproductive process commences with the production of gametes. The gametes are the sex cells that develop inside the gonads, th
A person is declared to be dead upon the irreversible cessation of spontaneous body functions: brain activity, or blood circulation and respiration. However, only about 1% of a per
why DNA copying is essential
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Where in the plants is a large amount of IAA found? The Auxins are produced and found in large amount in the apical buds of the shoots and stem and in the young leaves.
Define Causes of Vitamin A Deficiency - Inadequate diet? A child is born with poor stores of vitamins and minerals due to maternal malnutrition. Diets of pregnant women are def
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