Top new questions this week:
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Modern humans need to get vitamin c from the diet, because we do not make it ourselves. Did neanderthals produce vitamin c? At what point of evolution exactly was this ability lost?
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I need to know which virus meets the following criteria: It has to be enveloped. It has to have a DNA packaging scheme similar to Adenovirus (basically, sticks most of itself together then draws in …
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According to Evolution of T4-related phages, there have been multiple instances of evolution in the T4 coliphages. Per the article, there are many T-even phages that have insertions from other …
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(In physics.stack I have been suggested to post my question also here.) In the classical theory of passive neurons (where the action potential is not yet excited), the voltage is successfully …
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According to the National Cancer Institute, a subdivision of the National Institutes of Health, clusters of lymph nodes are found in the neck, underarm, chest, abdomen, and groin. Why are lymph nodes …
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Look at the resonance curves of the L-cone (OPN1LW) in humans, it has its peak at ~570nm and rises up in the lower wavelength (higher frequency) area. For me as a musician, that looks like a natural …
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Greatest hits from previous weeks:
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Although blue foods exist, they’re rare enough compared to other foods for food preparers to use blue plasters as a convention. The natural colour of a given food is due to pigments that have some …
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All the DNA extraction protocols I have seen involve adding salts to the extraction buffer. What is the purpose of the salts? What happens if they aren’t included?
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Why is DNA made out of deoxyribose and RNA made of ribose? Why can’t they both use ribose or deoxyribose? I think that the deoxyribose gives an advantage in storing genes, the job of DNA and ribose is …
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If I squash an insect and it produces red “juice”, does it always mean it is a blood-sucking type of insect? Or do some insects have red “juice” themselves, so the color is red on its own and not …
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On hot summer days, when I drink water to quench my thirst, my body immediately responds by sweating in 5 to 10 seconds or maybe less. How does our body detect the presence of water in the stomach so …
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Okay, I was learning about mitosis and meiosis in school and had a question. I know in Mitosis you first start off with a Diploid (2N) cell and then end up with two …
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I overheard a rather heated argument about whether or not animal cells have vacuoles. One person said that they do, but they’re much smaller than vacuoles in plant cells. The other person said they …
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