2
votes
1answer
9 views

Why do Mangoes have a single large seed, and not multiple small ones?

I was just thinking about this, wouldn't it make more sense for a mango to have multiple seeds, as it would allow more seed propagation?
1
vote
1answer
14 views

Does documentation exist that shows the evolutionary connection between common horses and the okapi?

I'm trying to put together some documentation on the relation between the common (modern) horse and the okapi. I've found a tree that shows that connection but it has no references. I'm hoping that ...
1
vote
0answers
14 views

Hypersensitivity Simultaneously in Ear canals

I got experimental data where hypersensitivity (i.e. tonic pain when touching ear canal) was recognised for about 100 minutes. I do not know which type of hypersensitivity is this one. IgM can ...
1
vote
1answer
45 views

Is there some genetic variance underlying music appreciation?

Is there any research done on the genetic variance for Music appreciation? If not, why is there no genetic variance for this trait?
4
votes
1answer
29 views

How can flies sense mirrors?

I've noted that flies in my house have no problem landing on even perfectly clean mirrors. Why don't they fly straight into them? Can they sense that there is a surface there, even though they can't ...
2
votes
2answers
76 views

What limits the speed of human perception?

I'm writing a novel in which the main character's perception and thought processes are sped up considerably, in essence slowing down the world around him. To others, it seems like his reactions are ...
5
votes
1answer
389 views

What is the female equivalent of the morning erection that some men experience?

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 ...
3
votes
1answer
21 views

What does hemozoin do?

My bio book refers to HEMOZOIN that is responsible for the shiver during malaria. How does hemozoin work to raise the body heat?
2
votes
1answer
18 views

Why does crying lead to a running nose and reddened nose tip?

Why do we have a running nose for quite some time after crying? It persists even after we stop crying. Why is it so? I have faced this always. Also, why does our nose redden on crying for long?
4
votes
0answers
30 views

Gender and age-specific mutation rate in plants

Background General According to Cochran and Harpending (2013), mothers transmit on average a number $x$ of new mutations to their offspring. This number $x$ is independent of the age of the Mother. ...
1
vote
1answer
19 views

Why do we feel cold on having fever?

Why do we feel terribly cold on catching fever of any sort, however our body becomes hotter? Why is it that a rise in temperature makes the sufferer feel colder? Also, sweating symbolises betterment ...
3
votes
1answer
18 views

Re-solidify disturbed agar plates

I am stuck in trouble while pouring LB agar onto my petri dishes. I had to add kanamycin to my plates just before it started to solidify, out of forgetfulness, which I tried to mix using the tip. The ...
2
votes
2answers
25 views

Where can I find a list of common enzyme cofactors and/or co-enzymes?

Where can I find a list of enzyme cofactors and/or co-enzymes, ordered by how common they are? For example, $O_2$, $H_2O$, $ATP$, $ADP$, $NAD$, should be ranked in the first places, because they ...
0
votes
0answers
32 views

Medical Student: How can I get a yr old female to gain trust in me in a abdominal exam? [on hold]

please be very specific with your answers. This is a medical question in which I need to know about how to calm a female adolescent and relax her during an abdominal exam.
4
votes
2answers
191 views

How many different protein coding genes are in the Human Biome?

There are approximately 20k protein-coding genes found in the human genome. This number is presumably very small when considering all the genomes found in the diverse microbes associated with the ...
6
votes
1answer
831 views

Dark veil when getting up too fast

I was asking myself this weird question. When you get up or stand up too fast, sometimes, you see something like a dark veil, and you aren't able to see anything distinctly for 2 or 3 seconds, then ...
2
votes
0answers
13 views

Does a presence of ants on a plant mean that the plant has been infested by aphids?

Ants protect aphids from their predators (such as ladybirds): Aphids and other hemipteran insects secrete a sweet liquid called honeydew, when they feed on plant sap. The sugars in honeydew are a ...
2
votes
0answers
13 views

Why are watermelons sweeter in the center?

Today I had a slice of watermelon and when I reached the outer parts of the pulp I wondered why those are less sweet. Whether or not the sugar occurs in crystalline form in watermelons is still an ...
23
votes
1answer
3k views

What causes morning wood?

Sometimes men wake up with an erection in the morning. Why does this happen?
0
votes
0answers
17 views

What chemical form of vitamin A is in chicken's egg yolk?

After doing some existing background research I am confused as to exactly what, in an unfertilised chicken egg's yolk, offers what we intake as 'Vitamin A' upon eating it. Plants typically produce ...
6
votes
2answers
420 views

Is it possible to genetically modify a plant at home?

Would I be able to genetically modify a plant at home? What equipment will be necessary? I think it might be a fun change from the 'norm'. Are some plants easier to modify than others?
1
vote
1answer
12 views

How do mushrooms react to being grown in a microgravity environment?

I'll use Agaricus Bisporus as an example mushroom. If cultured in potato dextrose yeast extract agar, will the resulting growth grow in a normal pattern? Will the sporocarps emerge from the surface ...
-1
votes
0answers
38 views

How to bring back to life a dead body? [on hold]

From biological perspective, is it possible to bring back to life a dead body? I need a thoroughgoing answer.
4
votes
1answer
29 views

Microbial Fuel Cell Reaction

I found a formula online which explained the reaction which occurred in the anode chamber of a microbial fuel cell but there was a typo $\small NADH + Ferredoxin_{(ox)} (NADH-Ferredoxin\ ...
1
vote
0answers
31 views

On the mechanisms of cellular growth [on hold]

Are there a 'set' of biological processes or situations genetic, epi-genetic or 'otherwise' that could cause cellular or tissue growth and repair where 'normal' functioning of the specific biological ...
1
vote
0answers
22 views

Experimental studies of bacterial adaptation to changes in nutrients of culture medium

Are there experimental studies that measure how a population of bacteria in continuous culture evolve when submitted to changes in the concentrations of metabolites in the culture media? For example, ...
3
votes
0answers
17 views

Cross section of actin network in neurites

for a simulation I am developing I would like to know how the actin network in neurites is distributed. Is actin confined to the periphery or is the whole neurite shaft containing actin with a rather ...
2
votes
1answer
77 views

Why does chewing enrage me?

Whether it's snacking on chips, munching on salad, or simply chewing gum, when I hear someone do it within an earshot, it drives me completely bonkers! It doesn't matter if it's my girlfriend, my ...
5
votes
2answers
52 views

biologically speaking, what's the difference between sleeping and just resting?

I can lay down in a rested position with my mind at ease, but no matter how relaxed I am or for how long i do it, it seems I'll still need sleep eventually. What's the difference - what is occurring ...
4
votes
0answers
20 views

How does Sodium Valproate cause neural plasticity

I have been reading a fascinating paper: Valproate reopens critical-period learning of absolute pitch 18 individuals were given Sodium Valproate (VPA) for a fortnight during which they trained on a ...
-3
votes
0answers
46 views

What really protects South Indians from hair related problems (baldness, greying etc) [on hold]

I believe eating coconut and its by-products can cure hairfall, greying and baldness problems. Real life example of this is people living in South of India which predominantly have been eating a diet ...
0
votes
1answer
22 views

What attracts cells to: pathogens, professional antigen-presenting cells, and cells with an antigen on its MHC-1 protein?

I have a few questions in regards to attraction/stimulation in the immune system. What attracts leukocytes and antibodies to pathogens in the first place? What attracts CD4+ cells to professional ...
27
votes
2answers
3k views

Why does cracking a joint make noise?

What causes the noise when you crack a joint? Is joint cracking harmful?
0
votes
1answer
67 views

How do ants know where they are going without eyes? [on hold]

I know that ants have some sense of direction, but what is the physiology behind this sense?
2
votes
1answer
36 views

Can foxes move their ears independently?

I've read that dogs can do move their ears independently, i.e., point one ear in the direction of a sound without having to point the other one at the same time. Is this a common trait with other ...
3
votes
1answer
28 views

How does sucrose protect bacterial cells in lysozyme solutions?

I have a microbiology question. When we put bacterial cells in sucrose solution with concentration higher than 0.5M we observe plasmolysis - the cytoplasmic membrane detaches from the cell wall due ...
2
votes
0answers
39 views

Does vinegar neutralize the strongly-basic compounds in cement? [migrated]

I have heard that washing one's hands with vinegar is effective in neutralizing the strong bases in cement and is more effective than water. I want to know how cement burns, and what bases are ...
0
votes
0answers
27 views

How much divergence would be needed for classifications as astrobiology?

It is possible that life has invaded mars or the moon by way of probes rovers and other man made tech. How many years or generations of sequential and phenotypical diverge would be necessary to ...
2
votes
1answer
42 views

MOL2 to PDBQT conversion via OpenBabel and MGLTools removes hydrogen atoms

I am trying to convert a MOL2 file (includes partial charges and hydrogen atoms) into a PDBQT file for re-scoring in AutoDock Vina. However, both approaches that I tried don't keep the hydrogen atoms ...
14
votes
1answer
3k views

Is humans' height ideal?

More or less we humans are around 1.70 meters tall. My question is, would it be possible to scale us? that is, is it in principle possible having humans 1 cm tall, or 10 meters tall or is there some ...
1
vote
0answers
23 views

Has anyone used Crispr/Cas to induce a knock-in in MEF cells?

Does anyone have experience with the crispr/cas9 platform performed on MEF? Or does anyone recall any relevent articles? Thanks
5
votes
4answers
2k views

Can nosebleed cause death?

Can Epistaxis or Nosebleed can be a of cause death?
2
votes
1answer
173 views

Identify this Harvestman

I spotted this guy in Switzerland. It's clearly an Opilione (Harvestman), but I really know nearly enough about this diverse group to be able to identify the species. Sorry, I didn't think to ...
6
votes
1answer
31 views

Location of nucleotide synthesis and transport

I couldn't find this question directly asked so I thought I would ask it In Fundamentals of Biochemistry 3e (Voet et al), it has a small small little comment about pyrimidine synthesis: (In a diagram ...
3
votes
1answer
37 views

Horizontal gene transfer versus convergent evolution

There are several often noted examples of convergent evolution (eyes, bat/bird wing evolution etc.) How do we rule out horizontal gene transfer in these cases?
0
votes
0answers
20 views

desaturation in fatty acids [duplicate]

humans are unable to synthesize EFA what is the reason behind it that humans cannot introduce double bond between C-10 and the methyl terminal?
2
votes
1answer
38 views

Can I identify this black ant queen?

I have an ant queen in a jar. This is what she looks like: Because I'm planning to start an artificial ant nest, I'd like to learn something about that specific species of ant. This particular ...
4
votes
1answer
112 views

High frequency human genetic oscillators?

The most well studied genetic oscillators in human genomes are involved in regulating the circadian clock (which operates on an approximately 24-hour cycle) and cell cycle activity (with single cycles ...
2
votes
2answers
32 views

What are some atypical examples of positive transcriptional cooperativity?

Cooperativity in gene expression is an important feature of many regulatory networks. Described using the Hill function, the most common example is a transcription factor (TF) that when bound to its ...
4
votes
0answers
44 views

Why does ant queen keep the eggs out of her hive?

I have captured an ant queen and now I'm trying to create an artificial ant nest. I have noticed that though she has dug a hole to hide in, she keeps the eggs out of it unless she feels that they ...

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