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What is the first polar body? How different is it from the oocyte II?
In oogenesis the oogonium differentiates into oocyte I (2n) and this cell enters meiosis. After finishing the first meiotic division (meiosis I) the oocyte I form two cells: the oocyte II (n) and the first polar body. The oocyte II is bigger due to it gets almost all the cytoplasm and the cytoplasmic structures of the oocyte I as a strategy for metabolite and nutrient storage. The oocyte II cell goes then to the second meiotic division. The first polar body is very lesser and almost lacks cytoplasm; it disintegrates or stays attached to the oocyte II.
Tolerance Range - Ecosystem Organisms are able to survive only within certain maximum and minimum limits with respect to each environmental factor such as water, light and tem
what is welfare in biology
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Place a slide of Amoeba (common species is A. proteus) under tlie lnicroscope and focus it under low power (5x x 5x), and observe it carefully. Amoeba looks like an irregular colou
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