2
votes
0answers
5 views

Is it even theoretically possible to restore Tiger population to 100,000?

The current global Tiger population is roughly 5100 according to Wikipedia. With habitat destruction and poaching continuing and no effective improvement in conservation, most likely the Tiger ...
0
votes
0answers
9 views

Blood pressure measurement

When measuring your blood pressure in your arm, when you hear the sound to measure the systolic, is that sound NOT the heartbeat?
0
votes
0answers
11 views

Is the immune system suppressed during sleep?

Of course we have heard that during stress our immune system is suppressed. This leads me to wonder, does the immune system get suppressed when we are sleeping and why? During both these conditions ...
-10
votes
0answers
23 views

What is this weird bug?

I found this strange bug and I am not sure what it is, but you can see it here: http://giphy.com/gifs/3oEdv9Rk6YKycSnF2U/fullscreen It appears to be contracting around. I believe these kind of ...
0
votes
0answers
7 views

population ecology life table data

Does there exist a centralized repository of population data of animals? I'm just curious about comparing trends of many species. I'm thinking about something that might look like (of course, this ...
2
votes
0answers
6 views

Cellulose acetate membrane filters vs. glass microfiber filters

At equivalent pore sizes and pressures, which exhibits faster flow rates, cellulose acetate membranes or glass microfiber filters? I know cellulose acetate exhibits low protein binding, but what ...
-1
votes
0answers
19 views

how can modern biologist solve the problem of hunger and malnutrition? [on hold]

Modern biologist can solve the problem of hunger and malnutrition by producing high yielding varieties of foods and more nutritious foods.
0
votes
0answers
15 views

Understanding F-statistics in population genetics

I am reading a classical Weir and Cockerham 1984 paper about Fst estimation. At the beginning (first page, right column), they define 3 statistics. $F$ is the correlation of genes within individuals ...
1
vote
0answers
44 views

Do genetic modifications exist to enhance the taste of tomatoes?

GM tomatoes seem less tasty. Has there been any research on GMOs with regard to taste? Can scientists introduce a gene to, let's say, tomatoes, which would enhance the flavour? If not, why?
-2
votes
1answer
34 views

Why do aquatic animals smell so bad?

Many have experienced the "fishy" smell prevalent with seafood, but why do aquatic animals smell so bad? Is it because of salt water?
1
vote
0answers
14 views

Can Nanodiscs be used to study membrane energetics?

Nanodiscs have changed they way we can study the structures, insertion, and functions of transmembrane proteins. Below is an image of a nanodisc bilayer. The key difference, as far as I can tell, ...
3
votes
1answer
22 views

How does pressure measured by sphygmomanometer translate directly to blood pressure?

If I understand correctly, a sphygmomanometer when wrapped around the arm and inflated only measures the pressure of the air inside the cuff, right? How does that translate directly to the pressure ...
2
votes
1answer
35 views

Are there histones present in the cytoplasm?

In this paper the authors depleted core histone heterodimers H3-H4 at 90 % from the cytoplasm of Xenopus oocytes. They state that their concentration is in the order of 6 uM. My question is, are ...
-3
votes
0answers
15 views

Why animals like cattles have less sized breast when compared to humans? [on hold]

Why animals like cattles have less sized breast when compared to humans? Even cattles produce more milk than humans.
3
votes
1answer
27 views

Is pulse rate measurable in the capillary bed and venous vasculature?

Pulse rate is easily felt when gently pressing the arteries in the wrist or neck region (Fig. 1). Fig. 1. Feeling the pulse at the radial artery. Source: Wikipedia Arteries supply the thin ...
-2
votes
0answers
14 views

What is a guppy fish, how much time they live? [on hold]

My aquarium is 54.55 liters, how much guppy I can put into it?
-1
votes
1answer
23 views

Critical discussion: Gene expression and systems biology allows us to understand the control of complex traits

I'm having a bit of trouble tackling this question. Any help on what I should write about or the points I should mention would be much appreciated. I keep seeing articles about eQTL and QTL are these ...
10
votes
4answers
1k views

Help identify this worm-like thing

Many instances of this worm-like creature were found in a water system for a mountain cabin in the Sierra Nevada mountains of the US, in late June / early July. The water system collects water from ...
1
vote
1answer
14 views

Genetic linkage greater than 50 centimorgans

Classically, the linkage between two loci can be measured in centimorgans (cM), which represents the percent chance that these two loci will recombine an odd number of times (generating a recombinant ...
-1
votes
0answers
44 views

What are the effects of alcohol on Dolphins? [on hold]

I have seen that dolphins appear to use blowfish to get high for recreational purposes. What I was wondering if someone has noted their demeanour while consuming alcohol? In humans alcohol acts as a ...
2
votes
0answers
23 views

Do animals commit suicide? [duplicate]

Do we have documented cases of animals purposely and consciously trying to end their own life? What leads to animal suicide, and is it preventable? I've heard mixed answers from various biologists. ...
-4
votes
1answer
69 views

How significant is the genetic component of homosexual behaviour?

From some basic googling, I found that nobody has ever proven that people are born gay and that environment plays a great part in homosexuality. I wish to know if there is a genetic component to ...
3
votes
1answer
37 views

Hodgin-Huxley model for a single neuron

I am viewing (through edX ) an introduction course to computational neuroscience. In the second lecture, the Hodgin-Huxley model is considered. I am going over some of the questions and have ...
10
votes
1answer
1k views

Why do chickens not try to get up if laid on their backs?

I've seen a few videos about chickens being laid on their backs for a few seconds after which the chickens stay in that position until they are turned over. Comments around the video suggested that ...
6
votes
1answer
118 views

Are there any theories why such an imbalance in chirality of molluscs?

Most gastropods exhibit sinistral (right hand) winding of their shells. But very few species are anti sinistral. Have there been any theories as to why such a great difference?
6
votes
1answer
38 views

Why do humans require vitamin B12 supplementation while herbivores do not?

This question came about from reading the comments of this (very unclear) question, which the author did not properly clarify. Vegans are often recommended to take vitamin B12 supplements, as the ...
0
votes
0answers
31 views

What is the reason our body stops producing collagen/elastin?

Stops producing elastin at around 14 years old. Collagen -- at 25-30. What is the reason?
2
votes
0answers
13 views

What is internal symmetry in membrane proteins?

I have come across the term "internal symmetry" in the context of membrane proteins, but have never found a satisfactory definition. I'm struggling to figure out exactly what this term means... What ...
6
votes
1answer
183 views

How can bats hear such high frequencies?

I attended a talk that glossed over some biology as it was talking about a certain protein. The speaker mentioned humans can hear up to, often less than 20kHz frequencies, whereas bats can hear up to ...
2
votes
2answers
47 views

What is the cause of colours of nail

Why the nails are of white colour from bottom? then why they are pink and again white in the end?
1
vote
0answers
23 views

Which bird of Upper Michigan is it?

While doing morning-walk in Keweenaw Penisula, Michigan; I found this juvenile bird wandering around looking for her mother ! Can someone spot which bird is it?
2
votes
0answers
24 views

Evolution of the Redundancy of the Genetic Code

In short Looking at the genetic code, it appears that most redundancy is on the third letter rather than on the first or the second letter of the codon. Why has it evolved this way? Longer version ...
4
votes
0answers
20 views

How does the Platypus grow before it eats?

From this fascinating documentary on monotremes it is mentioned that the Platypus is born less than 1 cm in length, but has doubled its size by day three when it begins to nurse. How does the animal ...
2
votes
1answer
41 views

What determines the pathway of a neurological signal?

My question is about the neurological signals. In our body when a signal, for example a hearing signal from hair cells, is built, it goes through a lot of neurons and it passes a lot of synapses. I am ...
0
votes
1answer
19 views

What fraction of sites are expected to be polymorphic?

Question Consider a very long (eventually infinite) DNA sequence of neutral sites. Consider a panmictic population of constant size $N$ with a per site mutation rate of $\mu$ where all individuals ...
0
votes
0answers
28 views

About the small intestine's Vitamin K absorption and large intestine's Vitamin K absorption [on hold]

Why in the small intestine does Vitamin K absorb to the lymph, while in the large intestine it absorbs to the blood?
0
votes
1answer
21 views

Is 100% accuracy in DNA sequencing possible?

I would like to obtain a complete genome of a canine (with mitochondrial DNA too) at 100% accuracy. Is it even possible with the current technology? The source I have is potential degraded, i.e. dried ...
1
vote
0answers
15 views

Which taxonomic classification schemes are most accepted?

Since the taxonomic classification schemes followed by universities around the world are different I wish to know which are the most accepted classification schemes till date concerning the following ...
2
votes
1answer
18 views

Physiology of tricuspid and bicuspid(mitral) valves

The tricuspid and bicuspid valves are atrioventricular valves. Both are valves that prevent backflow of blood pumped from the atria to the ventricles. However, the former has 3 "flaps" while the ...
0
votes
0answers
14 views

MIN 6 cell culture [on hold]

I am trying to culture MIN 6 cell line. After one passage and about 5 to 8 days later the cells show round morphology,however I did not found any linkage between them they look all apart from one ...
4
votes
2answers
99 views

How does decreasing surface tension of lipids help to emulsify them?

According to my chemistry book, water has higher surface tension than lipids. But in my biology book it is written that "the gall forms an emulsion of water and lipids by lowering the lipid's surface ...
0
votes
0answers
18 views

Book recommendation on the human muscle system

I would like to learn more about the exact mechanism behind our movements, especially about what happens during intense training when anaerobic state arises.
1
vote
0answers
17 views

Negative association between habitat quality and reproductive success in birds

I'm looking for bird studies that have found either a negative correlation or no correlation between habitat quality and reproductive success. Or in other words, bird studies that have found that ...
5
votes
2answers
28 views

Need some good resources to learn about Protein function and structure

I'm taking a course on biochemistry at edx. Since I'm a computer science student, I'm having some trouble in understanding many biochemical concepts. While the first module was just fine, I found the ...
0
votes
1answer
19 views

seqtk trimfq using Parallel fastx_trimmer [on hold]

I'm new at this, and I'm trying to do RNASeq. I've done the quality analysis already with fastqc. Now, I'm on the quality control part. I need to use seqtk trimfq or fastx_trimmer to trim the first 5 ...
-1
votes
0answers
30 views

How do formic acid from ants causes acids? [on hold]

Ants release acids but how do they work? Ants release them for protection but how does it affect others?
-1
votes
0answers
26 views

Inducing Totipotency and Pleuripotency [on hold]

Totipotent cells can divide and differentiate into any type of cell. Pluripotent cells can divide into many types of cells. Is there any way to induce any of these? If yes, how?
-2
votes
0answers
25 views

How does carrying sea anemone help Hermit Crab? [on hold]

Sea anemone is carried by hermit crab. what is the advantage?
-1
votes
0answers
52 views

Why does somebody have to take a live-long medication when diagnosed with hypothyroidism? [on hold]

People suffering from hypothyroidism have to take L-thyroxine for the rest of their lives. This strikes me a bit, doesn't the thyroid have a self-healing ability? For example, the liver and lungs are ...
2
votes
0answers
37 views

Skin extra sensitive to heat after burn

I just got my finger burnt (first degree burn $\Rightarrow$ I didn't even bother to bear the wound). It didn't hurt much, even when I pressed the wound. However, when exposed to heat (hot water, but ...

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