In the block to polyspermy, entry of the sperm's contents causes calcium ion levels in the oocyte's cytoplasm to rise, triggering the cortical reaction.
In biology, polyspermy describes the fertilization of an egg by more than one sperm. Diploid organisms normally contain two copies of each chromosome, one from each parent.
The cell resulting from polyspermy, on the other hand, contains three or more copies of each chromosome—one from the egg and one each from multiple sperm. Usually, the result is an unviable zygote. This may occur because sperm are too efficient at reaching and fertilizing eggs due to the selective pressures of sperm competition.
The cortical reaction is a calcium-dependent exocytotic process in which the content of secretory granules is released into the perivitellin space immediately after fertilization, which serves to prevent polyspermic fertilization.
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El ser humano se encuentra en los niveles tróficos correspondientes a los consumidores, específicamente, un omnívoro -capaz de consumir tanto vegetales como carne- por lo que ubicarlo en un nivel trófico resulta complicado.Nov 7, 2016
Examine what was wrong with your prediction
In "In the shadow of war" Omovo follows the soldiers and the woman most likely because he <span>yields to the curious whims of boys his age. The correct option among all the options that are given in the question is the first option or option "A". I hope the answer has come to your desired help.</span>
Photosynthesis is the process through which plants convert light energy into chemical energy. Here is the chemical reaction involved: As we can see, water and carbon dioxide combine to form glucose and oxygen. Since new chemical species are formed, photosynthesis is clearly a chemical change
