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Regarding option C: Although it is correct that testosterone is converted into DHT, it is the former, not the latter, which is responsible for differentiation of the mesonephric (a.k.a. Wolffian) ducts: Between 8 and 12 weeks, the initial secretion of testosterone stimulates mesonephric ducts to transform into a system of organs—the epididymis, vas ...


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You are saying what hydrogen bonds are doing, not why are they able of such achievements, despite being so weak. Their strength is in numbers. At room temperature, fully one fifth of the water molecules are engaged in four bonds with other water molecules, while the remainder forms two such bonds. (More detail at http://www1.lsbu.ac.uk/water/hbond.html ). ...


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Your homework is a probability question. If you flip a coin 10 times, what's the probability you will get heads 10 in a row? The hw brings up centromeres so you will ignore recombination.


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This is a classic Fermi estimation problem. The usual approach is to estimate the volume of a body, estimate the volume of a cell, and divide one by the other, remembering of course to have both volumes in the same units. My quick attempt gave 1013 to the nearest order of magnitude.


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I realize this question is about yeast, but I'm afraid that people may try to expand the answer to all systems, and beta galactosidase is not good for all systems, particularly for animal studies. I've seen too many gene therapy papers try to get away with using it. Beta galactosidase is not a good reporter gene for in vivo gene delivery studies. There is ...


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Find, or calculate, a value for the volume of the sperm head. Find a value for the size of the human genome (haploid or diploid?) Convert the genome size, which will probably in Giga basepairs, into mass (I suggest picograms). Divide mass by volume to get a density, pg μm-3 Refinement - does the sperm nucleus take up all of the head volume? Do you ...


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I don't think any of the answers here are quite right, so I'll give a try: (A) The resting membrane potential of -70 mV would not change with either GABA or glutamate treatments. The answer here is: "It depends". For glutamate, if the neuron only had NMDA receptors that were not "open" at -70 mV, there would be no change in resting membrane potential. ...


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Its true that T-test are used when your dependent variable is Numeric and Chi-Square test is used when you are analysis categrical variable. But how about this: You have a categorical response (0,1) to a campaign. 1 who bought the product and 0 who did not. If you sum up the responses in your Test group and Control group and devide them by thier respective ...



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