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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
Describe Pharmacologic Agents in amyl nitrite ? Amyl Nitrite : It produces vasodilatation which initially results in marked fall in BP and in the next 30-60 seconds there is
ADP is lower energy form of ATP, containing two (in spite of the three in ATP) phosphate groups attached to the adenine base and ribose sugar.
Note on production of haploid by tissue culture.
What is (a) the male gamete, and (b) the female gamete in a flowering plant? (a) The male gamete in a flowering plant is the pollen grain (strictly, the gamete is the male
what is cell?
Enumerate the stages in trabecular bone surface remodeling The stages in trabecular bone surface remodeling are: 1. Quiescence - resting state of the bone surface. 2. Act
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Why the rate of photosynthesis does increases, peak, and then reduces as temperature increases? Increasing the temperature initially accelerates the many chemical reactions in
What is Plastids? The most obvious difference between plant cells and other eukaryotic cells is that cells of most plants contain unique organelles called plastids, which inclu
What is the activity of a 0.35 M/L CaCl2 solution? What is the osmolarity of this solution?
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