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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 do you mean by Advanced characters The traits, or characteristics, that an animal has that are not ancestral to the taxon. They appear later in the evolutionary history of
Based on your understanding of the nitrate reductase and nitrite reductase tests, why would the inclusion of nitrite inhibit anaerobic growth?
Fatty acid breakdown brings about the oxidation of long-chain fatty acids. The fatty acids are first transformed to their acyl CoA (coenzyme A) derivatives and then degraded by the
Testicular Hypoplasia Hypoplasia refers to testicular disorders related to congenitally underdeveloped and underactive spermatic epithelium of one or both testes even though t
What is Splitin first heart sound ? In complete RBBB, due to delay of tricuspid closure, the split is wide. In complete LBBB, due to delay of mitral closure the S I is single.
A zoologist is investigating a population of squirrels whose coat color is controlled by a single gene whose two alleles (B1 & B2) are codominant. B1B1 individuals are black, B1B2
Q. Fats requirements during congestive cardiac failure? Fat: The quantity and quality of fat would be governed by the severity of hyper- lipidemia and adiposity. Emphasis, as
Compensatory Hypertrophy It has been seen that the exact replacement of a part or organ or tissue is not the just only way to regenerate in animals so many of the body's inte
How do embryos of placental mammals excrete nitrogen wastes? Placental animals, as well as embryos, excrete urea. In the adult placental mammal urea is excreted by the urine.
in what order did the shellfish belong? in what genus did the shellfish belong? in what species did the shellfish belong?
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