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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
Determine the Food Sources of Iodine? Please note that unlike other minerals studied so far, like selenium, the iodine concentration in foods is highly variable and also depend
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Microorganisms and Plants can synthesize all of the 20 standard amino acids. Mammals, furthermore, cannot synthesize all 20 and must obtain some of them in their diet. Those amin
What is the significance of torsion? An unusual twisting of the gastropod body which has left all members of class with an asymmetric body plan and a U-shaped alimentary tract,
Energy Allowance: Energy Allowance: The patient's requirement for energy varies with the physical activity and physiological condition. For instance, consider a person con
What are Antifoaming Agents In food industries, undesirable foams may be formed such as in concentration of fruit juices, coffee extracts, vegetable oils and syrups or in ferm
Q. Why is cannibalism an inharmonious intraspecific ecological interaction? In the cannibalism an individual eats other of the same species (occurs in some arachnids and insect
Why is rubella during gestation a threat to the fetus? If occurring during gestation rubella is a dangerous disease due to the virus crosses the placenta and contaminates the f
The cranial nerves are composed of twelve pairs of nerves which emanate from the nervous tissue of brain. In order to reach their targets they should ultimately exit/enter the cr
An ecosystem consists of two types of components: (a) Abiotic components: This includes the non-living components of the ecosystem. These are physical and chemical fact
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