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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
a) How would you destarch the leaves of a potted plant? b) How would you check that the destarching had been effective? a) If a potted plant is kept in darkness for
Making a rock collection A collection of the common rocks found in the community can be made by asking every pupil to bring in single piece of rock. Explain to the pupils that
main external morphological feature that differentiates platyhelminthes from nematodes
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Submission of evidence items to the forensic laboratory requires that a specific "Evidence Submission Request Form" be completed. What information should be included on the form?
Explain the Explosion Puffing? Explosion puffing has been recognized as one of the most significant developments in dehydration technology. In explosion puffing, partially dehy
Fishes- Regeneration in Vertebrates Several different parts of the fish body will re-grow. Plucked scales are promptly replaced by new ones and amputated gill filaments can re
What is the difference between ulcerative colitis and Crohn's disease? The differences between the two include: I) Anatomic distribution of the inflammatory process: Crohn'
Cyclosis is a type of internal cell movement in which an oriented flow of circulating material is formed and maintained in the cytoplasm by the action of microfilaments. Cyclosis i
difference between axon and cyton
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