Top new questions this week:
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My teacher taught me that bony fishes are ammonotelic while the cartilaginous fishes are ureotelic, but why does that happen? Why do cartilaginous fishes not excrete ammonia?
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I am not properly educated in biochemistry so I apologize if my question makes incorrect assumptions or uses bad definitions. I am confused about the seemingly interchangeable usage of “lactate&…
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How similar is chimpanzee mitochondrial DNA to human? Does it show the same single ancestor?
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I seem to recall that bees and wasps have alert pheromones, so that if a few of them are killed or attacked in the proximity of others, they will attract backup. I assume it’s pretty straightforward …
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Reading into the types of synapses I found out that there are two types of them; electrical and chemical. chemical synapses use neurotransmitters to transmit impulses, are slower than electrical …
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Is there any running experiment to selectively breed non-human smart animals? I saw some scientists made overly tame and friendly foxes using fust selective breeding. Could it be possible to add the …
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Pyruvate is used in Krebs cycle and oxidative phosphorylation to generate most of the ATP required. Isn’t it more direct to use pyruvate in IV drip compared to glucose? Also, we will only lose 2 ATP …
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Greatest hits from previous weeks:
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In Skeptics.SE, a question regarding the skulls of children arose. Depicting a scary skull where the permenent teeth are “hidden” inside the jaws and the milk teeth are in the their place. After all …
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When you get a shot for a vaccine (for example, the annual flu vaccine), the nurse frequently indicates that your arm will ache for a day or two, maybe more. This ache is typically not just a pain …
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As I understand it, the main difference between the Bacteria and the Eucaryota domains are that eukaryotes have a nucleus and bacteria don’t. I understand that bacteria and archaebacteria have enough …
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Why draw blood from veins rather than arteries? Is it more convenient or safer?
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There was question about what causes “morning wood.” It was answered that the erection in the morning is caused by decline of norepinephrine during REM sleep. Which in part allows to prevent …
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Is it even possible that plants with non-green leaves have chlorophyll, and do such non-green leaved plants carry out photosynthesis?
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An answer at Pets suggested using dawn dish soap to kill fleas. I did a little looking around, and found several references supporting the idea. Most of what I found was in ‘selfhelp’ and ‘save a …
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Can you answer this question?
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Many Ceratopsids, mostly of the subfamily Centrosaurinae, have long spikes or prongs sticking out from the edge of the frill, most famously Styracosaurus, but also Diabloceratops and Rubeosaurus and …
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