Happy Leap Day! We'd like to take this opportunity to celebrate all things anuran with a Frog Megathread. Post your questions here! |
- Happy Leap Day! We'd like to take this opportunity to celebrate all things anuran with a Frog Megathread. Post your questions here!
- Why is botulinum bacteria not in environments with normal-high oxygen levels?
- How was COVID-19 discovered?
- Do magnets affect the flow of an electric current?
- Does the amount of soil available to a plant affect how it grows?
- Which keeps my coffee warmer longer: holding the cup in my hands or leaving it alone on the table?
- Can a neutron star gain mass and become a black hole? If it can then wouldent the singularity beyond the event horizon be neutron star sized rather then a small point?
- If a person with 20/20 vision wears my glasses, does their vision blur as much as my vision is naturally blurred?
- How genetically "similar" are two most genetically different organisms?
- What exactly are we doing when we clear our throats?
- CD4 vs CD4+ vs T-cell. Brief explanation of how they relate to HIV/AIDS?
- Are there any examples of drugs(pharmaceutical ex.) that work well in humans but not in animal testing models?
- What factors determine the max RPM of engine bearings?
- recent studies show that gray matter keeps growing into early adulthood does this only pertain to certain areas of the brain or all of them?
- Why does systolic pressure increase more than diastolic during exercise?
- Oxytocin vs. Dopamine vs. Serotinin etc?
- Does the cuff pressure of a sphygmomanometer increase your heart-rate by stopping your blood flow?
- With additional glucose, will a plant perform additional cellular respiration?
- Planetary Sci.What's the smallest size body that can support it's own breathable atmosphere?
- How does a female paper nautilus create it's shell?
- How does water flow inside a closed moving barrel?
- Can trees communicate with each other?
| Posted: 29 Feb 2020 09:19 AM PST Happy Leap Day! We hope you're jumping for joy on February 29. To celebrate, we'd like to open up a Frog Megathread. Our biologists will be on hand to answer your questions! Anura is the largest extant (i.e. not extinct) order of amphibians, with over 6,300 documented species. There are a few things that set frogs apart:
We can't talk about frogs without mentioning that amphibians are experiencing a global decline, and are going extinct much more quickly than background extinction rates (PDF). There are a number of causes at play. One is known as amphibian chytrid fungus. This fungus has caused the extinction of more species than any other pathogen. It has caused the decline of 501 amphibian species, caused a further 124 to drop by 90% or more, and caused the extinction of 90. Additional factors in amphibian decline include habitat change (destruction or loss), affecting as many as 63% of amphibian species; invasive species including fish or even other amphibian species; environmental toxins like pesticides; and global climate change. Today we'd like to celebrate our froggy friends, call attention to the importance of their conservation, and answer any questions you may have. Please join us on our Leap Day Frog Megathread! [link] [comments]  |
| Why is botulinum bacteria not in environments with normal-high oxygen levels? Posted: 01 Mar 2020 05:51 AM PST I always read botulinum bacteria live and grow in low oxygen conditions. How about in oxygen rich environments, can they still survive in it? If not, is this because oxygen kill them, lack of oxygen is conducive to a certain chemical reaction, oxygen rich environments allow other types of bacteria to thrive and deprive them of resources, or what? [link] [comments]  |
| Posted: 01 Mar 2020 02:12 AM PST If I had the kind of symptoms that are associated with COVID-19, I'd assume I had the flu, and I'd stay in bed for a couple of days. But presumably some people would go to the doctor with those symptoms. And I'd expect the doctor to also diagnose the flu, and tell them to stay in bed. But at some point, someone must have gone to the doctor, and the doctor said "I know it looks like the flu but I'm not too sure so let's do some tests", and then the tests came back as showing it was a new variety of Coronvirus. So what would have prompted a doctor to request those tests? [link] [comments]  |
| Do magnets affect the flow of an electric current? Posted: 01 Mar 2020 04:47 AM PST I know it's kind of a stupid question, but I have been thinking this for a while. Do magnets affect the electricity itself that flows inside a wire? For example, say I am charging my phone and it's connected to a wall socket. If I placed a magnet in the middle of my charger wire (like literally on top of the wire) would the magnet stop the electricity from flowing since it's getting attracted to the magnet? Would it have any effect at all on the flow of electrons inside the wire? [link] [comments]  |
| Does the amount of soil available to a plant affect how it grows? Posted: 01 Mar 2020 07:16 AM PST Would a plant in a pot with a high volume of soil grow bigger than one in pot with a low soil volume? if so is it the depth of the soil that's important or is it the length/breath that would affect it? And does the answer vary depending on the plants roots? Edit: Or is all of that irrelevant and it's really only the soil quality that matters? Edit2:the plant in question is a succulent [link] [comments]  |
| Which keeps my coffee warmer longer: holding the cup in my hands or leaving it alone on the table? Posted: 01 Mar 2020 08:00 AM PST I often hold my hot drinks (coffee, tea, etc) in my hands to warm up. Does this make my drink lose heat quicker than if it was left to alone sitting on a table? [link] [comments]  |
| Posted: 01 Mar 2020 07:01 AM PST |
| Posted: 29 Feb 2020 09:41 PM PST |
| How genetically "similar" are two most genetically different organisms? Posted: 29 Feb 2020 10:48 PM PST I suppose I need to clarify a bit. Let's take humans and e. coli. They are probably not the least similar organisms, but I'd wager my pick is close enough, and human - e.coli most recent common ancestor must be pretty close to LUCA in time. How actually similar are their genes? Both coli and humans have the same DNA-RNA-Proteins-Lipids machinery. The DNA of both must at least code for the same tRNA, and proteins\complexes like ribosomes or polymerases must also be at least somewhat similar. We both run on ATP so I suppose the enzymes that are involved in the process must be also at least partially similar. I'm curious as to how exactly similar we are. know that human genome is several orders of magnitude larger than of e.coli, but still. Approximately what percentage of e.coli's genome can be said to have similarities with human's? [link] [comments]  |
| What exactly are we doing when we clear our throats? Posted: 29 Feb 2020 05:44 PM PST |
| CD4 vs CD4+ vs T-cell. Brief explanation of how they relate to HIV/AIDS? Posted: 29 Feb 2020 03:52 PM PST What's the difference between these three or are they same? Specifically with HIV, which does it attach to? [link] [comments]  |
| Posted: 29 Feb 2020 04:08 PM PST We all know there are plenty of drugs that work well for mice but don't translate into humans, are there any examples of the opposite occurring? [link] [comments]  |
| What factors determine the max RPM of engine bearings? Posted: 29 Feb 2020 06:07 PM PST I've been reading into the Honda B-series engines a lot lately and a trend a lot of budget tuners followed would be to put a VTEC head on a B18B1 motor from an Integra LS (dubbed the LS motor for that reason, not to be confused with GM's LS engines...) and it got the name "LS-VTEC". There's a lot of controversy about how reliable LS-VTEC builds are because that engine [B18B] had a different oiling system (also reliability is heavily dependent on quality of the engine builder), but also apparently the B18B engines had different bearings than native VTEC motors (B18C, B16A/B, etc) and a lot of tuners would wind their engines out into the 8000s or beyond, and 'spin a bearing' [among other types of catastrophic failure in the reciprocating assembly], while Honda's Type R engines would happily wind out to 8400-8800 RPM from factory, evidently they must've designed better bearings for the higher revving VTEC engines. The thing that's got me thinking, what features of an engine bearing are changed to survive higher RPMs? Or is it less about the bearing and more about the viscosity and pressure of engine oil? [link] [comments]  |
| Posted: 29 Feb 2020 06:40 PM PST recent studies show that gray matter keeps growing into early adulthood does this only pertain to certain areas of the brain or all of them? [link] [comments]  |
| Why does systolic pressure increase more than diastolic during exercise? Posted: 29 Feb 2020 05:46 PM PST |
| Oxytocin vs. Dopamine vs. Serotinin etc? Posted: 29 Feb 2020 10:52 AM PST I'm always hearing things like "hug your pet, it'll release oxytocin!" Or "high fives are just free serotonin!" Or "kissing gives you a dopamine rush!" These all just sound like pleasurable things to do but what are the real differences between these substances for a layman like me? Do different activities release different chemicals? Will Batman fool the Joker's plan to poison the water supply? So many questions!!! [link] [comments]  |
| Does the cuff pressure of a sphygmomanometer increase your heart-rate by stopping your blood flow? Posted: 29 Feb 2020 05:38 PM PST Can someone explain why this might happen. It appears the heart is trying to work harder, but can someone explain why. (other than by just saying it is because of the pressure applied by the cuff, we already know that) [link] [comments]  |
| With additional glucose, will a plant perform additional cellular respiration? Posted: 29 Feb 2020 02:28 PM PST Above - with an influx of carbon dioxide and water, which turns into glucose via photosynthesis, will a plant increase its respiration rate because it has additional glucose? or will the respiration rate stay the same? Does anyone have a source for this as well? I need to in-text cite. [link] [comments]  |
| Planetary Sci.What's the smallest size body that can support it's own breathable atmosphere? Posted: 29 Feb 2020 10:03 AM PST A common trope is a couple astronauts land on a planet, the computer announces that the atmosphere is breathable and they proceed to take off their helmets revealing immaculately coiffed hair unhampered by the vagaries of space travel. What is the smallest size body that can happen and are there (non-planets) bodies in our solar system that are candidates [link] [comments]  |
| How does a female paper nautilus create it's shell? Posted: 29 Feb 2020 05:16 PM PST |
| How does water flow inside a closed moving barrel? Posted: 29 Feb 2020 05:01 PM PST If you roll a barrel on a relatively flat surface, how does water move inside if it's mostly filled? I tried doing an experiment and putting ping pong balls, beads to see if water moves inside or does it just stay pretty stable (like a person in a car) and it's just the barrel/container moving? I know it might deal with fluid dynamics but isn't that more like the pressure that is pushing against the walls? I'm interested in the flow of the water inside. Thank you. -a 9th grader. [link] [comments]  |
| Can trees communicate with each other? Posted: 29 Feb 2020 01:00 PM PST |
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