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1500 questions
12
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3 answers
How is the fluoride in toothpaste absorbed?
How is the fluoride in toothpaste absorbed by our body? Does the tooth absorb the molecule directly, or is it absorbed by the mouth?
The answers to this question suggest that some materials can be absorbed by the mouth, but fluoride is absent.…
dotancohen
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12
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1 answer
How tolerant are ants to cold?
There was a trail of what are commonly known as sugar ants (small, brown, hyperactive) in my kitchen. Three of them walked onto an ice tray placed in their path.
They only walked a short distance on the ice before being immobilized by cold. I put…
daniel
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12
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2 answers
Is it possible to combine live attenuated and non-live vaccines?
There are many combination vaccines available but I've noticed that there don't seem to be any with both live and non-live components, e.g. DTaP/IPV/MMR. Such combinations could be useful in some cases, since most developed countries give a second…
Gelatin
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12
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2 answers
Is there an equivalent to "Fields Virology" for Bacteria?
I've gotten a staggering amount of use out of my copy of Fields Virology as a general reference for "getting me up to speed" on whatever pathogen I'm currently looking at. I don't know of a similar type of reference for bacteria, but I only became…
Fomite
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12
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1 answer
Identify a bird
I have taken this picture of a bird in university zoo in Tel Aviv. It was approximately 25 cm high and seemed to be a flightless species. Can somebody help me identify it?
Klara
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12
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3 answers
How best to count bees entering and leaving a hive to measure hive activity?
This is my first question here, so I apologize for all mistakes I could have possibly made.
I'm a high school student in East-Central Europe and I need to complete some research for a biology contest (asking for advice is accepted, so I'm not…
user6774
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12
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2 answers
Can dish soap really be used to kill ticks and fleas?
An answer at Pets suggested using dawn dish soap to kill fleas. I did a little looking around, and found several references supporting the idea. Most of what I found was in 'selfhelp' and 'save a dime' type books and web sites. So while it seems to…
James Jenkins
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12
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3 answers
Why do cockroaches burst from soapy water?
(careful, disturbing!)
I was experimenting with some stray cockroaches that ended up falling in my bath tub overnight (there is currently an infestation undergoing in my apartment building) and I found out that they are very easily killed by simply…
user1306322
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12
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2 answers
Glomerular Filtration Rate
In practice, when you have vasoconstriction of the glomerular capillaries and subsequently an increase in blood pressure, glomerular filtration rate increases. However, this seems counterintuitive to Bernoulli's principle.
During vasoconstriction,…
jp89
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12
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4 answers
Do any organisms recycle their own waste internally?
I thought of this question yesterday and it turns out it's surprisingly hard to Google.
Izzhov
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12
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3 answers
Species with reproduction barriers that can both reproduce with a third species
To start with, I do not have a sound knowledge in biology or any formal education in the area.
I was told that one of the definition of a species is a reproductive barrier, which means that if two animals can't reproduce, they are of different…
SIMEL
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12
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2 answers
Why is SOC medium recommended for transformations?
In pretty much every transformation protocol I've seen SOC medium is used to grow the bacteria for a short while after the tranformation and before plating.
I've usually substituted LB medium for this step for easy retransformations, but I gather…
Mad Scientist
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12
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1 answer
Why is the 3'UTR region highly methylated in most of the human genes?
Most of the human genes are found to be highly methylated in their 3'UTR region (0.8-0.9%). I was wondering if there is any specific reason for this?
Garima Kushwaha
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12
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1 answer
What are the olfactory chemicals in whiteboard/permanent markers and what do they bind to in the nose, lungs, and brain?
What are the olfactory chemicals in whiteboard/permanent markers and what do they bind to in the nose, lungs, and brain?
aqua
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6 answers
Is there a downloadable list of all species along with their traditional classification?
I'm looking for a downloadable list of all known (or better said, online documented) species in this straightforward format, as an example the European Frog:
Kingdom: Animalia
Division: Chordata
Class: Amphibia
Order: Anura
Family: Ranidae
Genus:…
Fer
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