0
votes
0answers
9 views

How to stop or slower down the process of growth of hairs?

Is it possible to slow down or stop the hair growth? if yes, then, How to stop or slower down the process of growth of hairs?
0
votes
1answer
26 views

What is the reproductitive advantage of grey-haired humans

A vast majority of humans get at least some grey hair as they age. AFAIK this applies to both genders and all races. Presumably this means that at least some grey haired humans have noticeable ...
0
votes
1answer
15 views

Why isn't Bubonic Plague as virulent as it once was?

Although I am admittedly not anywhere near an expert on any topic, I still have a hard time understanding how Black Death and Bubonic plague are one in the same. Since plague still exists, with news ...
0
votes
1answer
11 views

What is the ratio of breathing rate to heart rate?

Breathing rate and heart rate are directly connected. This is because the heart is connected to the lungs via the pulmonary artery. I first thought that breathing rate would be half of the heart rate ...
0
votes
0answers
10 views

(How) can a pink grasshopper exist?

I saw this foto on Reddit recently: Is this possible? How can a grasshopper become like this? Is this just natural genetic mutation?
0
votes
0answers
11 views

multiple HIV infection in same T cell

I was wondering can multiple HIV virus infecting same T cell ? Coz in flu virus they have SA to cleave of those sialic acid residue preventing re-infection of the same cell by other viruses to ...
1
vote
1answer
19 views

Regarding the difference between cDNA library and RNA sequencing (Biochem. technique)

I was wondering why establishment of cDNA library required the step of reverse transcription (i.e. turning the sequence into DNA) why not directly using the extracted RNA for sequencing and converting ...
1
vote
1answer
20 views

How to estimate the DNA density in human sperm head?

I have got an estimate of sperm head volume from internet.Like consider it as a disk of order 4$\mu$m to 5$\mu$m. Now I wanted to find the DNA density in the sperm head. How to find that?
0
votes
1answer
11 views

What triggers the release of gonadotrophin-releasing hormone with the onset of puberty?

I am interested to know the process of development of puberty. During puberty, when boys/girls reache 12-14 (puberty) years of their age, their hypothalamus releases gonadotropin releasing hormone ...
0
votes
0answers
17 views

Homologues chromosomes [on hold]

At the end of meiosis 1, can the chromosomes within a cell formed behave as homologues? If yes, then what can be consequences; if no, why?
4
votes
1answer
23 views

Alfred Jost's rabbit experiment: how did he actually do it?

I was watching a Crash Course on Biology YouTube video by Hank Green: Great Glands - Your Endocrine System. Hank humorously describes a sex determination experiment by Alfred Jost as follows ...
3
votes
1answer
16 views

Is the water transpired by plants pure H₂O, or does it contain trace minerals?

I'm considering the idea of drinking water that I trap from what is transpired by trees. Interestingly, is this water a fairly (or maybe even extraordinarily) pure form of H₂O, a remarkably pure ...
1
vote
1answer
25 views

Why do pine stands exist?

I live in the midwestern United States. I cycle to work, sometimes on heavily wooded roads, and I can't help but notice that in most places within the surrounding deciduous forests Pine and evergreen ...
4
votes
1answer
205 views

What is this beetle?

During a pit stop on the road from North Carolina to New York (somewhere in Delaware) I found the following (dead) insect in the car park: As you can see from the quarter next to it (25 mm ...
1
vote
1answer
16 views

What is the name of this big plant with a purple trunk and green to purple berries? [duplicate]

I have photographed the following plant in our garden in Pittsburgh, PA. Do you know the name of the plant?
1
vote
1answer
23 views

How do Type I restriction enzymes work?

According to NCBI, type I REases have a specific target sequence but randomly make cuts at sites far from the target sequence. How does the restriction enzyme travel from the target sequence to the ...
5
votes
1answer
21 views

Is oxidative phosphorylation less efficient in gram positive bacteria?

Gram negative bacteria perform oxidative phosphorylation in their periplasmic regions, between the inner and outer membrane where a proton gradient is maintained and used by the ATP synthase to make ...
3
votes
0answers
15 views

Null distribution of Blomberg's K

I've noticed different functions in different R libraries have different ways of assessing significance for Blomberg's K. For instance, picante's phylosignal looks at a distribution of PIC variance ...
3
votes
0answers
24 views

When did CRISPR/Cas9 evolve and what is the likelihood that a superior system for live cell genome editing has already evolved on earth since then?

I've read that CRISPR/Cas9 is currently being implemented and tested for its ability to edit genomes in live cells (Summer '14), and that it is supplanting other genome editing tools in the lab, such ...
5
votes
2answers
66 views
26
votes
10answers
4k views

Can humans survive without consuming life?

Some people say that it's awful that humans eat animals. They feel that it's barbaric, because you're killing life and then on top of that, you're eating it, and that you should eat vegetation ...
4
votes
1answer
56 views

What are the atmospheric requirements for large dinosaurs?

What are the atmospheric requirements for large dinosaurs? and are the atmospheric constituents for supporting large dinosaurs any different from the atmosphere today?
3
votes
3answers
35 views

sex limited genome transmission

In general, for dioecious species, a large portion of the genome passed from parents to offspring of both sexes - in mammals the X-chromosomes and autosomes are passed from a mother to both daughters ...
2
votes
1answer
33 views

What is a protective epitope?

What is a protective epitope? An epitope is basically a part of antigen. So does it mean that when the epitope combines with an antibody, it helps in the functioning of the antibody instead of going ...
2
votes
0answers
22 views

How can oxygen production during photosynthesis be measured?

I'm curious how people measure quantitatively photosynthetic rate in labs. I've seen many qualitative examples with direct observations of bubbles forming in water due to photosynthetic output of ...
2
votes
1answer
25 views

Is severe but short-term pain worse than moderate but prolonged pain for the body?

I'm wondering about the effects of different durations and intensities of pain on the body. So the two can be compared, let's say that the cause of pain is the same in both cases, but in one the ...
2
votes
0answers
13 views

What can myelination tell you about the evolution of sensory receptors?

I am reading Avi Chaudhuri's Fundamentals of Sensory Perception and wondering if the information given about the somatosensory system could tell us anything about the way it evolved. It seems (at ...
0
votes
1answer
35 views

Is it possible to convert nerve signals or electrical activity into a readable format? [on hold]

Can we have the technology to recreate the informations (like images, sounds etc.)[as in the form of signals in our mind] from human mind to human understandable format? In short, can we read human ...
0
votes
1answer
16 views

Pollinator mating system in orchids

I came across three terms in an article on pseudocopulation. However I don't quite understand what it means. They are: 1) solitary and haplodiploid 2) social and haplodiploid 3) diploid These ...
2
votes
0answers
31 views

What does the term 'epitope mapping' mean? [on hold]

Epitope mapping means identifying the binding site of antibodies on the target antigen. This means that the site to be identified is part of the antigen and not antibody, am I right?
2
votes
2answers
30 views

Where I can find information about the study of animal vision?

I read a lot of articles on the internet about how dog see the the world. But I can't find the source of these study. I want to know how did scientist setup the experiment to find out animal vision. I ...
4
votes
2answers
39 views

What is the mechanism of oxygen uptake in E. coli?

How does E. coli uptake oxygen? Most of the literature I found is concerned with response to oxygen level supplied in the medium, as opposed to how much is actually transported inside. Can they shut ...
4
votes
1answer
33 views

What are the effects of sleep deprivation?

Having recently pulled an "all-nighter" while trying to fix a fatal bug in our release code, I started thinking of any health risks that I might have. What are the adverse effects of staying up for ...
0
votes
1answer
43 views

Does the fossil record disprove Evolution? [on hold]

It is said by people opposed to Evolution, that the fossil record contradicts and disproves it. They say all the animals suddenly appeared, exploded everywhere, were fully formed, had no transitions, ...
7
votes
1answer
296 views

What happens to bones that do not heal?

I would like to know the steps the body takes to heal a broken bone and what happens if it cannot heal properly. I am not looking for advice or explanations on resting and not doing activity, I am ...
1
vote
1answer
33 views

What is the fastest growing bacterium?

E. coli has a generation time of about 20 min, and a single CFU will generate a colony a few millimeters in diameter after 16 hours of incubation. Is this the upper limit? How much faster can ...
1
vote
1answer
57 views

Why do humans have only one liver? [on hold]

Humans have two lungs, two kidneys... But only one liver. If the liver is vital to our survival, why do humans only have one?
2
votes
1answer
72 views

Is there a difference between drinking water straight from the tap compared to leaving it to sit?

An idle question - if a glass if filled from the tap and consumed immediately, it contains some dissolved oxygen from the physical process of moving through the pipes & tap. If left out ...
2
votes
2answers
59 views

How do I perform recurring pattern mining or regular expressions of nucleotide sequences?

I am interested in performing nucleotide sequence pattern-mining (regular expressions) which is 12 characters (sequences) in length from a dataset. Is that possible to script using MATLAB?
2
votes
0answers
19 views

Do bees make honey from fallen fruit?

I know bees make honey from nectar, and I know they drink the juice of fallen fruit, but do they actually make honey from fruit, or do they only eat from it for themselves?
2
votes
1answer
35 views

Do flies actually take off backwards?

I've been told that flies take off backwards, but I haven't really been able to prove it to myself. The closest I've gotten was noticing that they fly into window glass back-first, with their heads ...
0
votes
1answer
24 views

Would it be possible to force the pineal gland to release dimethyltryptamine on command?

To my knowledge, the pineal gland is responsible for the release of dimethyltryptamine (DMT) upon death. Would it be possible to force the pineal gland to release this DMT while still living?
2
votes
2answers
45 views

What is an Ihh-/- mouse?

This one is too basic question: I just came across $Ihh^{-/-}\ $ mouse. Is that means this mouse devoid of that gene Ihh. What is this sign called and are there other such representations?
9
votes
3answers
67 views

What is the smallest scale at which blood vessels, nerves and other structures are deterministic?

Super simple question, but I can't find the answer on the Internet (and I'm in a foreign country so the library is not English.) As the title says, what is the smallest scale at which blood vessels, ...
3
votes
0answers
44 views

Hoechst red and blue spectra - what does the red emission tell us?

I understand that the blue spectrum is emitted when Hoechst 33342 binds to nuclear DNA. But what exactly is the red spectrum telling us? I read that the red spectrum can be indicative of apoptosis, ...
1
vote
1answer
16 views

Do snail shells increase the number of rounds with age?

Do snail shells increase the number of rounds with snail age?
1
vote
1answer
34 views

Does a woman's G-spot actually exist?

Does a woman's G-spot actually exist? Are there any research studies? Links: G-spot (Gräfenberg spot) at Wikipedia U.S. gynaecologist says he has found the G-spot
0
votes
0answers
18 views

Replacement HDAC inhibitor for VPA [on hold]

I am attempting to recreate an experiment in which VPA promotes critical period learning Valproate reopens critical-period learning of absolute pitch However, my body has a strong negative reaction ...
3
votes
1answer
17 views

What class of histone deacetylase (HDAC) inhibitor is sodium valproate (VPA)?

VPA is a known HDAC inhibitor. But I cannot find what class it is. What class is it? And is there any method of finding an answer better than floundering with Google?
1
vote
1answer
23 views

Why some muscles have more tendons than others?

Very interesting examples to me are Trapezius or Latissimus - they both have places with more tendons than muscles. Taking into account that now they contract weaker and slower with all these tendons, ...

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