-2
votes
0answers
25 views

what makes different materials to have different tastes? [on hold]

what makes different materials to have different tastes? For example: what we know as different colors is due to different frequencies of light and what we know as sound is due to the different ...
0
votes
0answers
3 views

Do bees have a “gesture language”?

One of the very things I boasted about when I was a junior high school student was that when a honey bee finds something actually worth sending a group of bees towards to, she returns to the hive and ...
2
votes
0answers
15 views

Why should a tumor look like a crab?

Origin of the word cancer The disease was first called cancer by Greek physician Hippocrates (460-370 BC). He is considered the “Father of Medicine.” Hippocrates used the terms carcinos and ...
4
votes
1answer
15 views

Can dolphins actually communicate linguistically?

Humans use "language." By language, I mean the thing I am using right now to talk to you. I know dolphins and orcas have very complex communication systems and also seem to process linguistic and ...
5
votes
1answer
28 views

Can anyone identify this chrysalis? (Identified)

It's about 5 or 6 cm long. It's on the outside (north facing) wall of my garage about a metre above ground level. Photo taken in Thailand near Hua Hin (about 12N 100E) in December 2014.
2
votes
2answers
45 views

Are domesticated animals really “more evolved,” or is that a myth/misunderstanding?

Often do I hear people speaking of how the domestic house cats are more friendly, less ferocious, less savage-like, and smarter and/or "more evolved" than their distinct but equivalent feline-species ...
18
votes
3answers
2k views

Hot water and bacteria

I know that it is common to say, "use hot water when washing your hands" or when you've got a cut, "wash your hands with warm water," etc. I was wondering, why is this the case? Since bacteria grow in ...
2
votes
1answer
37 views
+50

Alternatives to commercially available flow cytometric analysis software for use in cell cycle analysis?

I know that many labs use either FlowJo or FCS Express to plot and analyze their flow data. These seem like the two standards for most labs (and I have used FlowJo before). However, my current funding ...
3
votes
1answer
33 views

Incestual Reproduction in Animals

I'm quite curious on how animals view incestual pairings. Given there are enough mates around, i have quite observed that most females (subjects are dogs, cats, pigeons and chickens) would go choose ...
0
votes
1answer
24 views

Do gibbons have a monogamous sexuality?

the question is already in the title. If possible, it might be extended to: Have animal taxa (mammal) who tend to live in a family structure have a monogamous sexuality? Or are there cases of these ...
1
vote
1answer
27 views

Will gene mutations give rise to a protein that is shorter than the full length protein?

What is the relationship between deletion or insertion of nucleotide in the gene sequence and the protein's length that is coded out from the mutated gene?
3
votes
1answer
60 views
2
votes
5answers
169 views

Why do some people find vegetables so repellent when evolutionarily they should find them an attractive and thus tasty food?

Why do certain people (especially kids) find vegetables so "repellent" when evolutionarily they should find them an attractive and thus tasty food? I ask this question because if Darwin's theory of ...
0
votes
0answers
20 views

“miRNA binding sites in the 3'UTR region and transcription factors binding site in the promoters of a specific gene”?

What does it mean when we are been asked about "miRNA binding sites in the 3'UTR region and transcription factors binding site in the promoters of a specific gene"? We will use databases like ...
-1
votes
0answers
14 views

how to differentiate between these slides under the microscope [on hold]

T.S of kidney of rabbit T.S of liver of rabbit T.S of pancreas of rabbit T.S of thyroid gland of cat and how do i differentiate between cardiac and skeletal muscles (L.s)?
0
votes
0answers
20 views

Why do I get dizzy when studying Biology? [on hold]

When I am studying biology or reading anything that has to deal with the human body or reading anything that talks about the human body or things that involve the following words: blood, heart, ...
6
votes
4answers
226 views

What kind of microscope for ML/biological research?

I am a computer science student, focusing on machine learning applications. I have been always interested in biology but I lack any training in it. Now, I had an idea that I could introduce myself to ...
0
votes
1answer
32 views

Specialist evaluation for people aged under 40 years with stage 1 hypertension

Reading the NICE clinical guideline for Hypertension it says... For people aged under 40 years with stage 1 hypertension and no evidence of target organ damage, cardiovascular disease, renal ...
1
vote
1answer
32 views

Is there a rule for the annotation of the basepair or gene locus origin in bacterial genomes?

Since all bacteria have one circular chromosome, there is no designated origin to start the systematic gene locus numbering. Therefore, what is the rule to start the numbering at a particular point ...
5
votes
0answers
19 views

Why do humans hear better between 2kHz and 5kHz?

I've recently seen the following image: Source: https://commons.wikimedia.org/wiki/File:Hoerflaeche.svg Translation (from German): The upper boundary (Schmerzgrenze) is where it starts to hurt ...
4
votes
2answers
91 views

positive and negative feedback

I want to know more about positive feedback in gene regulation and to know the similarity and differences between positive and negative feedbacks.
7
votes
2answers
85 views
+50

Skin porosity in glans penis when erect

(Apologies if this is a too weird/inappropriate question in this forum. I only thought that I ask it since it happens to be part of human life.) The skin on a human typically blocks many substances ...
-1
votes
0answers
26 views

What is the ratio of air to flesh inside a live clam's shell?

Is a live clam's shell completely filled with flesh or is there some air/water in it? If so how much water/air is there in comparison to flesh? I'm curious if the density of a clam changes through ...
4
votes
2answers
198 views

How is membrane capacitance related to the increased speed of saltatory conduction?

Here is the original question which inspired my question. As explained by the answers there, the reason saltatory conduction in myelinated neurons is faster than non-myelinated conduction is because ...
2
votes
3answers
33 views

Long term storage of agarose-ethidium bromide gels that have already been cast

I have come up with what I thought was a clever idea: Store the agarose gels I pour, and only cut as many lanes as I need to run later, minimizing wasted agarose (and wasted effort/time) when I need ...
1
vote
0answers
10 views

Coniferous trees in temperare rain forests

In temperate rainforest, the dominant plant form is often coniferous trees (source). However, coniferous trees are also the dominant plant form in a very different climate and form a different biome ...
-2
votes
0answers
32 views

Transparent watery fluid [on hold]

What is that transparent fluid coming from the tips of finger when skin is peeled off ? Is that actually lymph ? Can I see my lymph ?
5
votes
1answer
29 views

Can the eye distinguish between pure and composite colours and how do we measure this?

Red light plus green light makes yellow light. Suppose I shone a pure red light, say 650nm, onto the same spot as a pure green light, say 550nm. The eye sees this two-peak spectrum as yellow. This ...
2
votes
3answers
93 views

fastq-dump using mkfifo to stream data

So, fastq-dump has the ability to be run on just an SRA file accession number, such that the SRA is converted to FASTQ on-the-fly, and the SRA doesn't have to be written to disk. I'm curious whether ...
10
votes
2answers
174 views

Did Darwin ever reach the conclusion that selection will remove variation?

According to simple models of selection the genetic variance in a population should be reduced by selection. (Fisher's fundamental theorem states that the rate at which a population can evolve is ...
2
votes
2answers
37 views

Choosing appropriate statistical test for ordinal data

Ordinal response variables show up often in biology, but I'm not sure how they are best analysed. Some examples are qualitative assessments (little, many, a lot) or risk assessments (low risk, medium ...
2
votes
2answers
31 views

Action potential changes in low sodium concentrations but constant osmotic pressure

If I bathe a squid axon in a fluid that has high sodium concentration , why does the duration of action potential decrease compared to a control experiment in low sodium bath but maintained at the ...
7
votes
3answers
48 views

Evolution: One big population vs. many small populations

Let's say I want to evolve a bacterium that is resistant to an antibiotic. I want to do this by growing initially clonal populations of bacteria in presence of this antibiotic for a long time. I have ...
0
votes
0answers
23 views

How do I import FASTA files into Haploview?

I'm trying to produce a haplotype network and so have decided to use the software haploview. However I'm having some problems importing my sequences into the software. I Have my sequences in a FASTA ...
8
votes
1answer
49 views

Mass spectrometry versus western blotting for validation

I have mass spectrometry data (LC-MS/MS) from rat cortices under either drug or control treatments. The results were performed in triplicate (three pairs of rats, drug or control per pair). In ...
2
votes
3answers
150 views

Can human brain memory be removed by EMP?

The human brain is the most complicated human organ so it is hard to examine it completely but based on what we know do you think (or do you know from some source) if a human memory can be removed by ...
1
vote
1answer
38 views

Deciduous trees in tropical rainforest

Some books says the dominant plant form in tropical rainforest biome is broad leaved evergreen trees. Other books say it is broad leaved evergreen trees and deciduous trees. What is the most accepted ...
-3
votes
0answers
21 views

Can apoptosis via high levels of capsaicin or resiniferatoxin aid in the destruction of viruses? [on hold]

A virus creates a barrier of proteins around it's host cell. Can high levels of capsaicin, or even resiniferatoxin be used to make virus infected cells self destruct for the purpose of possibly ...
3
votes
1answer
35 views

What is the purpose of segments in citrus fruit?

What is the purpose of segments in citrus fruit? In my experience, each segment usually contains from zero to two seeds. I may have seen more but only rarely, if I remember correctly. What is the ...
6
votes
2answers
144 views

Ni-NTA purification, problem with the chaperone protein

I'm trying to purify the protein by Ni-NTA affinity chromatography. It seems that my protein (size about 54 kDa) is co-purified with chaperone protein (probably GroEL - as the band is around 57kDa). ...
-3
votes
0answers
23 views

How is the protein removed from the DNA preparation? [on hold]

to determine how much DNA you have, you measure the absorption of the DNA.
7
votes
3answers
901 views

What is the science behind the inaccurate perception of colors?

If I go into a green room (all walls are semitransparent and green) and spend some time - around 10+ min - in there, when I come out all my eyes see is white as pink. I see no (or very few other) ...
0
votes
0answers
37 views

Immunotoxin to kill viral infections [on hold]

I have been working on a project about fragment antigen binding antibodies. I was researching on immunotoxins. Immunotoxins are basically toxins attached to antibodies so that when the antibody ...
1
vote
0answers
31 views

Persistency of botulinum toxin in environment

There is information about decontamination times here on pages 6 and 7. My specific question is how persistent botulinum toxin is in a natural environment, or alternatively, what is the half life of ...
8
votes
2answers
96 views

Is there any evolutionary advantage of selection of L-amino acid over D-amino acid?

After listening to a scientific talk, I had this question that why in the natural selection process, are the L-amino acids selected over the D- form. However, we still we produce D-amino acids; ...
7
votes
1answer
453 views

RNA seq and using of Poly(A) or non-Poly(A) based amplification of RNA

I'm studying "Deep sequencing the circadian and diurnal transcriptome of Drosophila brain" Hughes et al., 2012. I've got some problems with the materials and methods. Before RNAseq, the authors ...
1
vote
1answer
21 views

G>T transversion VS. T>G transversion?

So I'm reading about how mutations in DNA can be caused by oxidative damage. An example of a product of oxidative damage is given: 8-oxo-7-hydrodeoxyguanosine My textbook says that this product ...
4
votes
1answer
30 views

What is the biggest facultative anaerobic metazoan known to science?

Related: What's the biggest obligate anaerobic organism discovered till now? I had always assumed that the Riftia tube worms were obligately anaerobic since they lived next to anoxic volcanic ...
1
vote
0answers
37 views

How do PER/CRY complexes accumulate in the cytoplasm?

The Period/Cryptochrome (PER/CRY) complex is a heterodimer that transcriptionally regulates circadian rhythm. When it is phosphorylated, it is transported to the nucleus and it inhibits a ...

15 30 50 per page