1
vote
0answers
4 views

What does nature do to prevent paw-snowballs?

This question made me wonder, why for example wolves don't suffer from these "paw snowballs"? (...) but after a few miles on the trails in soft snow, he often develops snowballs between his paw ...
0
votes
0answers
2 views

Gene centromere distance in yeast tetrads

I'm not getting the formula for calculating distance between a centromere and a gene in a Neurospora tetrad. Formula: Distance(gene to centromere)= 100 * 0.5(tetrads showing MII segregation)/(total ...
3
votes
2answers
197 views

Why do carnivores evolve?

If humans can live without consuming other animals, then why we do it from a biological point of view, why do we eat meat? I would also extend the question to another animals, because many animals are ...
3
votes
3answers
1k views

Are these lovebugs?

I used to see these insects frequently in Chennai and Bangalore (South India). I just would like to know if this is a kind of lovebug. The lovebug as mentioned in the Wikipedia page is, however, ...
0
votes
0answers
17 views

How do deciduous trees adapt in tropical climate?

I'm planning to plant deciduous trees in my yard, i.e. maple and oaks. Normally, they grow well in cold climate region, such as Japan and Canada. But I lived in tropical climate region, Indonesia, ...
0
votes
0answers
13 views

What is suction tension? [on hold]

I have come across the term and don't get the meaning. I'm seeking an explanation. I've seared the internet. Thank you.
0
votes
0answers
10 views

Are there water conservation methods that increase waste instead of reduce it? [migrated]

For example, does improperly washing clothes lead to mosquito increases or other-organism morbidity? Does using dish water on the garden attribute to clean water more or more wasted water (is it ...
2
votes
1answer
26 views

Is there an acceptable term for 'male fox' other than 'dog'?

I'm writing a lab on sexual dimorphism in Arctic foxes. As such, I use the words 'dog' and 'vixen' fairly often. In the discussion section, I compare the results from the lab with the results from ...
0
votes
0answers
10 views

Types of fermentation?

I read about several rarer forms of fermentation such as ABE, and heterolactic. What is the full list of all known types of fermentation, and what are the differences between them?
1
vote
1answer
32 views

Conserved acetylation sites in a given protein

I want to identify potential conserved Acetylation sites in protein X. As it is known, acetylation happens in Lysines (K), thereby I would like to identify conserved K residues for protein X during ...
0
votes
0answers
3 views

Highest and lowest values(in microvolt) in ECG for humans?

I'm currently trying to parse the records captured from the ECG device and display them on a mobile application. Just wondering what are the highest and lowest possible values for humans? What may ...
1
vote
4answers
478 views

Punnett Square Help

In fruit flies, red eyes are dominant over white eyes. Show a cross between two white-eye fruit flies. My question is... How do I know if the white-eye fruit flies are homozygous or heterozygous?
1
vote
1answer
35 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 ...
0
votes
0answers
6 views

E. coli UV exposure?

What amount of UV can E. coli survive? Or how should I phrase my query when searching for research on this topic? I know that UVC will kill E. coli after an amount of time, but I'm not finding much ...
0
votes
0answers
9 views

Obtaining a mapping of RefSeq ACs to Uniprot ACs

I am trying to obtain a mapping for RefSeq Accession Numbers to Uniprot Accession Numbers. I can write a script to do this for a list of RefSeq ACs like this: ...
0
votes
0answers
6 views

Looking for hard cell segmentation problem

I am a physicist working on a new image segmentation technique, and I would like to test it by segmenting some images with low-refined cells on a noisy background... Do you know where I could find ...
6
votes
1answer
3k views

How does a pine cone open?

When a pine cone is wet, it remains closed. However, when it's dry it opens again. From the perspective of physics or biomechanics, what is the mechanism that allows a pine cone to open and close as ...
0
votes
2answers
32 views

Structure of Cell

Are cells spheres or ovals/circles bound by phospholipidbilayer? If they are spherical how are we able to see the nucleus through the phospholipid bilayer under a microscope?
0
votes
1answer
25 views

When you take a very cold or hot bath how is that influencing your breath?

It looks like when you take a cold shower or bath your vains are getting smaller and when its hot your vains are getting wider. But is that wright and do you need to take a breath more in both cases ...
-1
votes
1answer
20 views

How is CO2 related to acidity?

In a plant cell why does increase in concentration of CO2 increase the acidity of the cell sap. Thank you
3
votes
1answer
28 views

What is the function of the polar bodies produced during oogenesis?

Why are polar bodies produced during oogenesis in human females? I read that polar bodies are produced during meiosis so that the oogonium (or gamete mother cell) can be converted into a haploid ...
0
votes
1answer
13 views

What happens if both forward and reverse primers have same Tm?

One of the key rules in primer designing is that Tm (melting temperature) of forward and reverse primers should be in the range of ±5°C. For example, if ...
5
votes
2answers
206 views

How many ATP are formed?

What is the number of ATP molecules formed during the photosynthetic processes which consume 8 molecules of $\text{H}_2\text{O}$ due to noncyclic electron transport and subsequent ...
1
vote
0answers
37 views

why does brain produces noise? [duplicate]

when i look at a white wall i see little colored dots moving in circles filling my whole visual view, just like the static on a tv but then in color. I thought everybody had this but recently i ...
1
vote
1answer
81 views

Why is heart failure treated as more critical than kidney failure?

The heart pumps the blood to supply tissues and kidney always filters the blood to remove urea,extra water and etc. And all these are vital,so the kidney is as important as heart: and my question is: ...
0
votes
0answers
23 views

My flow cytometry antibody won't reach saturation

I am staining human neutrophil populations (CD177) and then trying to get a different test target antibody to give a dose response to binding to this population. I have tried concentrations of the ...
0
votes
0answers
12 views

mRNA extraction from mice ears.

I am trying to extract RNA from mice ears and for some reason I don't have RNA when I perform the electrophoresis. I directly cut the ears and I put it in a tube with a bead and trizol. then I place ...
1
vote
0answers
9 views

Database/Reference on optimal conditions for plant growth in greenhouses [on hold]

We are a group of computer science students currently working on a university project to create a (almost) self-sufficient greenhouse. The hardware and software aspects being almost finished, we ...
2
votes
1answer
49 views

Are the cells (structures) of deep sea fish different? And can they survive in shallow water?

In the deep oceans the pressure is enormous. But still there are fish living. But are the cells of them different from fish who just live at the surface of waters? For example, are the cells smaller ...
0
votes
0answers
3 views

How to incorporate intraspecific variation in discrete characters in comparative analyzes?

I'd like to run a multivariate analysis (Pavoine et al. 2011) that aims to disentagle the effect of environmental gradients on traits, considering its autocorrelation with phylogeny and space. It uses ...
3
votes
0answers
19 views

What, if any, experimental evidence is there that flies rub their legs together in order to clean them? [duplicate]

Everybody's seen a fly rubbing its hands together like Mr Burns. And almost everybody's heard the standard explanation - that it's cleaning itself. Now, this is certainly a very plausible explanation, ...
0
votes
1answer
46 views

What are most common natural causes of death?

What are most frequently occurring natural causes of death?
5
votes
1answer
809 views

Why do we get 'bags under our eyes'?

Why do these circles form around the eyes if somebody is tired? And why does fatigue express itself around the eyes this way? Can I get eye bags very quickly in another way? ...
0
votes
0answers
8 views

Gut fauna genetics vs epigenetics

During childhood your gut fauna gets populated from the environment and the people you meet. Unlike baby koalas, we do not eat our parent's faeces to populate that fauna. The environment in your gut ...
0
votes
0answers
6 views

Oligomeric states of Phyre model

Is it possible to generate an oligomeric state for a phyre model? As it lacks crystal packing information "Generate>Symmetry_mates" obviously does not work in PyMol. I assume that the fit is not ...
42
votes
4answers
3k views

Why do smaller mammals move intermittently?

I was watching a nice little video on youtube but couldn't help but notice how snappy smaller animals such as rats and chipmunks move. By snappy I mean how the animal moves in almost discrete states ...
0
votes
1answer
20 views

Concentration of a specific promoter in a cell?

I want to simulate transcription activation by a given transcription factor (TF) with known kinetics. The binding rate $k_{on}$ is given in $\mu M^{-1} s^{-1} $, describing a bimolecular reaction ...
6
votes
2answers
184 views

Sugar as a defence against bacteria?

An answer on another SE site mentions that sugar "at a certain level acts as a preservative". I've always been taught that microorganisms eat sugar and expel acids, that is why sugary food are ...
4
votes
3answers
93 views

Why do bacteria die in a high sugar content environment?

I was reading some questions in the test bank. Then in Chapter 27, I wonder why the answer is A. (undergo death by plasmolysis). Is the high concentration of sugar that kills them or the effects of ...
0
votes
0answers
23 views

Difference between genetic adaptability and micro evolution? [on hold]

Do both occur at individual level? And which among the two is responsible for a species to maintain its specificity?
5
votes
1answer
1k views

What is our skin made up of?

Again, it is a basic question. What is our skin made up of? is it made up of many cells arranged in a systematic way or is it just like any layer say of a book?? what is the difference? where is the ...
8
votes
3answers
9k views

Why is it that cats can jump so high for their size, compared with humans?

My cat is about 1' high at the shoulder, and I am a little over 6', but my cat can easily jump onto something as high as I am. That is 6x it's height. If a cat can do this, then Why can't I jump up ...
0
votes
0answers
12 views

Cloning Stragedy

Recently I am learning about TOPO cloning in a class. I have questions regarding to this: In the TOPO-TA cloning, they use topoisomerase I to cut the backbone of the vector so it will covalently bind ...
0
votes
0answers
7 views

Placental Adherence and Premature Heartbeat

I am studying the placental adherence in premature fetuses i.e. from 22nd week to 38th week of gestational age. About 60% of placental adherences are diagnosed during labour, which increases the risk ...
4
votes
2answers
49 views

What is the definition of a mutation?

There are two alleles that determine the sensitivity of a person to Coumadin (a medicine for blood thinners used to treat a stroke etc). Sometimes you encounter the terminology that one has a mutation ...
0
votes
0answers
19 views

Does the source of caffeine affect the biological impact?

I've recently decided to give up my morning coffee in lieu of a caffeine pill. Both are around 200mg (my Tim Horton's XL 4x4 was 240 mg of caffeine) of caffeine. We were talking about the various ...
0
votes
0answers
28 views

Sexing fish from a tissue sample

How can you tell the gender of a fish from a tissue or blood sample and what equipment do you need (how much magnification in a microscope)? A bit more info: I am a member of a local fish club, we ...
1
vote
1answer
34 views

How and why do skin tags develop?

WebMD writes: Skin tags are small, soft pieces of skin that stick out on a thin stem. They most often appear on the neck, armpits, upper trunk, and body folds. The cause of skin tags is not known. ...
1
vote
2answers
32 views

How does the mechanism which controls blood pressure in the brain work?

I've heard that the blood pressure in the brain is organised by a special mechanism. What is that and how does it work?
0
votes
0answers
16 views

What is the effect of sodium chloride on head lice?

There are a lot of products that claim to kill lice and eggs. The main ingredient is sodium chloride. How does it work? I wonder if it has something to do with osmotic effects?

15 30 50 per page