how many cells are produced by spermatogenesis

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Question:2) If a human cell contains 22 autosomes what is a Y chromosome called? 3) In what process are two ATP, 8 NADH and carbon dioxide produced? 4) Does glycolysis yeild the most energy? 5) Is water the final product of aerobic respiration ? Thanks to anyone who can be of any help!!!!!!

Answers:1) The mitotic spindle originates from centromeres. There are two centromeres on opposite ends of the cell. Microtubules go forth from there, bind chromosomes and eventually are pulled apart. 2) I'm not sure what the 22 autosomes has to Y-chromosome is called, but the Y-chromosome would be a sex chromosome. 3) The Krebs cycle 4) No, glycolysis only yields a net of 2 ATP (4 ATP produced - 2 ATP used). By far, the most energy is from the electron transport chain. 5) Yes, aerobic respiration uses oxygen and glucose and converts it to carbon dioxide, water and ATP.

Question:Please reply soon I'm in a hurry. -thank you

Answers:It depends on the amount of solar flux your panel has falling on it and the efficiency of your panel. I'm assuming that you mean photovoltaic panels At high noon, you may get a flux 1100 W/m^2 on your panel, other times of the day, may be significantly less. You can design a tracking mount, whic will help keep the sunlight incidence angle normal to your panel. The panel itself, depending on design will have an efficiency of 12-25%., so, for best case (high noon on a sunny day, 25% efficient panels), peak output, you're looking at a cell area of about 24 m^2 to get 6.5kW How many cells it takes to cover that area depends on the dimensions of the individual cells. The panels themselves may be larger since the space between the cells and subpanels will likely not be zero. Your cell efficiency will also vary with temerature, humidity, cleanliness of the panels and other factors.

Question:If 5.45g of copper was reacted with 20.0mL of 16M Nitric acid (HNO3), how many grams of Cu(NO3)2 will be produced in solution?

Answers:moles copper = 5.45 / 63.546 g/mol=0.0857 moles HNO3 = 0.0200 L x 16 M=0.320 Cu + 2 HNO3 = Cu(NO3)2 + H2 HNO3 is in excess moles Cu(NO3)2 = 0.0857 mass Cu(NO3)2 = 0.0857 x 187.56 g/mol=16.1 g

Question:We are comparing the amount of pollen cells produced by one anther to ovules produced my one ovary of a flower in my bio class. I got about 60 ovules in each flower... but how many pollen cells in each anther? Thank you.

Answers:I don't know of an exact answer to the number of pollen in an anther. However, each microspore mother cell produces four pollen grains so there are many more pollen grains produced when compared to the number of ovules in the carpels. The number of pollen grains will vary depending upon the species of plant and how the pollination occurs. A wind pollinator will produce many more pollen grains than one in which insects do the pollination.

From Youtube

Biology: Spermatogenesis: Meiosis in Males :www.mindbites.com This lesson covers the biological explanation of how sperm is created. It discusses both meiosis in the male that create sperm (spermatogenesis) and an explanation of why sperm are structured as they are and a description of where each of these processes take place anatomically. Additionally, there is a discussion of how developing sperm cells receive nurtrients. Sperm are produced in the seminiferous tubules of the testis. These tubules are arranged in layers that parallel the stages of meiosis. Germ cells produce primary spermatocytes which divide to produce secondary spermatocytes, which divide to produce spermatids, which develop into sperm. The process of sperm creation is called spermatogenesis. It is basically the type of meiosis that occurs in males (where oogenesis is the type of meiosis that occurs in females). Meiosis is the division of a diploid cell (has a diploid number of chromosomes) into 4 haploid cells (gametes). In the process of spermatogenesis, a diploid cell sees a doubling of chromosomes and then is divided into two separate diploid cells in Meiosis I. Following this is a second division in which the outcome is four cells with exactly half of the number of chromosomes as there were in the original cell that divided in Meiosis I. Last, Professor Wolfe will explain why men don't 'run out' of sperm cells while women do run out of eggs during the course of their life (because the germ cells that go through meiosis to create sperm also ...