1
vote
1answer
52 views

Can magnetoreception occur in humans?

Magnetoreception is a sense which allows an animal to detect the Earth’s magnetic field in order to perceive direction, altitude, or location. Magnetoreception is present in bacteria, arthropods, ...
3
votes
1answer
123 views

What is the name of this about 5cm high, grey, Beanie shaped fungus?

I found those below some stone stairs in Germany. The grass gives you an impression of the size (I guess the grass is about 5-7cm tall)
1
vote
2answers
91 views

How do T-cells determine which cells they've already inspected?

From what I understand, T-cells are constantly traveling in the body, inspecting cells by looking for antigens. If they're self antigens, then the T-cell doesn't attack, whereas if they're non-self, ...
3
votes
0answers
20 views

Effect of ethanol and detergent on cell membranes problem

I am currently writing my biology report for an experiment I did on how ethanol and detergent affect the cell membrane. For my ethanol experiment, all went as expected BUT for my detergent experiment, ...
1
vote
1answer
32 views

Mangroves and desalination of sea water

I am not an expert but I guess that mangroves (or some other plants that thrive in sea water) perform some kind of desalination to extract fresh water from sea water. Is this true? If yes, What ...
1
vote
0answers
36 views

FitzHugh–Nagumo system with diffusion

I was studying the FitzHugh-Nagumo model with diffusion and I quite do not understand the meaning of it. If we consider the system without diffusion, \begin{equation}\label{FHN}\begin{cases} ...
1
vote
1answer
51 views

Nomenclature for mutations at specific nucleotide positions

I'm sure this is a basic question, but I couldn't find an answer anywhere. Let's say I'm provided with the location of a nucleotide as location as FGFR3:c.1843-35A>T. What does "1843-35" mean?
0
votes
1answer
23 views

What is the relationship between stroke volume of blood and ventricular end-diastolic volume? [closed]

I do know what each term means. That is, i know that stroke volume is: the volume of blood pumped by each contraction of a ventricle, while ventricular end-diastolic volume is: the volume of blood in ...
-1
votes
0answers
26 views

perception of time during sleep/dreaming [closed]

Almost all of you might have observed at some point in your life that while sleeping, your brain creates a story matching to an external stimulus. Most of the times external stimulus is very short ...
2
votes
1answer
48 views

What would kill you first water or cola? [closed]

After discussing this with some colleagues, I devised the theory that you could drink more coca-cola in a single sitting than you could water, without killing you. Defining the volume it would take ...
1
vote
0answers
17 views

Mechanism by which water flows through xylem

I was doing a Cambridge iGCSE past paper when I came across the question: Describe the mechanism by which water flows through the xylem I thought the correct answer would revolve around the ...
0
votes
0answers
14 views

Speciation : More rapid in sexual or asexual population [closed]

A similar species of plants exist at two altitudes. At higher altitudes where pollination is low, the plants reproduce asexually. Whereas at lower altitudes where there are pollinators cross ...
0
votes
0answers
13 views

burying food scrap in soil: aerobic or anaerobic reaction? [on hold]

I have been trying to avoid putting food scrap into trash so I have been burying them in the backyard. However, someone just asked me whether I was actually creating anaerobic reaction out of food ...
0
votes
0answers
18 views

Why brain swells after brain death? [closed]

Hot nose is a known symptom of probable brain death . I read that it happens due to cessation of blood flow to the brain from swelling. Or is hot nose sign only valid for death from intracranial ...
0
votes
1answer
35 views

Mendel Genetics: Homework question

I'm looking at a question right now about Mendel genetics..... Q) When Mendel crossed a large number of tall pea plants with short pea plants, all F1 plants were tall. The F2 generation was created ...
-1
votes
0answers
38 views

Sequence Scan for CRISPR- sgRNA design & scoring question [closed]

My lab is attempting to implement the Sequence Scan method from the publications "Sequence determinants of improved CRISPR sgRNA design" We have used the website referenced in the publication, ...
0
votes
0answers
20 views

Can i freeze in 40 degree warm water? [closed]

I remember someone telling me that you can freeze in water even if its above your body temperature? Not that I am scared but what if you're in a hot tube for 30 hours while eating and drinking ...
5
votes
1answer
54 views

Do two compatible tRNA codons bond together?

Can two tRNA with complementary anti-codons link together? For instance UUU with AAA. If not, why not?
-3
votes
0answers
42 views

How do cell organelles maintain their unique membrane composition?

Describe some of the ways that membranous organelles can maintain their unique compositions despite the continuous traffic of membranes and materials moving through them. This question is from Gerald ...
0
votes
0answers
15 views

Assessing the Impacts of Illegal Bushmeat Hunting, Limpopo, South Africa [closed]

I want to assess the impact of illegal bushmeat hunting over a large area of Limpopo, South Africa with camera traps. What would the best method be to statistically assess this data? Ideally, I would ...
1
vote
2answers
36 views

When was the first exception to Mendelian genetics discovered?

In addition to the the question in the title I'd like to know , how scientists reacted to the exceptions?
3
votes
1answer
42 views

Species Identification: Snake, New Mexico

The snake is about one and a half inches in diameter at its widest, a half inch at the head, and about two feet long. I found it in central New Mexico. It's hard to see the head in the pics, but it ...
0
votes
0answers
9 views

How were CDK1 and cyclin B identified?

I know that MPK is a dimer containing cyclin B and cdk1 and this promotes entry into mitosis. The experiment I have found was that when MPFs were micro-injected into frog oocytes arrested in G2, the ...
0
votes
1answer
33 views

Given the number of individuals who have a recessive disorder, how can one calculate the probability that the disorder was inherited? [on hold]

Just to be clear, this is not homework. Suppose a biological family has five children, two of whom have a certain recessive genetic disorder that is not sex-linked. The parents themselves do not have ...
0
votes
1answer
16 views

Why is flash light harmful to what aquatic life forms?

When visiting an aquarium, it's often not allowed to take photographs with a flashlight on. It is said that the flash light with very high intensity is harmful to the displayed life forms. I respect ...
1
vote
0answers
18 views

Extraction of arthropod embedded in animal tissue

I'd like to extract an ectoparasite from a biopsy of animal skin for subsequent identification. The mite is small, about 100 um, and embedded in a column of tissue. It's too small to manually excise ...
6
votes
2answers
81 views

Why would a mother reject her offspring if it has been “interfered” with by humans?

There was a recent incident at Yellowstone National Park in which tourists placed a bison calf in their vehicle, and that eventually led to the calf being euthanized. The National Park Service issued ...
0
votes
1answer
25 views

What are the binding sites (or receptors) of cortisol?

I am in the process of a OCR GCSE Case Study, and my question is "Do the benefits of anabolic steroids outweigh the risks, which has an obvious conclusion. I need to know the scientific name, or a ...
1
vote
0answers
7 views

Can HPV be infectious after it's been exposed to environment?

From what I know, HPV virus cannot be cultured I don't think it's possible to say if a sample has the potential to infect or not but what does it mean when they say HPV virus particles could persist ...
0
votes
1answer
11 views

After hysterectomy does FSH secretion stop?

This question came in an exam, and my reference book says yes, it does. But it hasn't explained why. If the ovaries are also removed, then the menstrual cycle should stop. In absence of hormones ...
2
votes
0answers
34 views

Do trees have genes for stopping the grow?

Do trees have genetically encoded to stop growing at some height, to keep dividing the cells only to a certain amount, or to pump nutritions only till it's advantageous because they've already ...
1
vote
1answer
64 views

Standard notation for dominant and recessive allele

I'm reading through some science that could come up in my GRE equivalency. I've never been much of a biologist, more of a chemist/geologist....though it does interest me massively! I'm just seeing ...
0
votes
0answers
11 views

What happens to the ink of a tattoo over time? [duplicate]

Tattoos are commonplace all over the world, but a simple yet key question is what happen to the ink injected in the derma over time. Is it digested by macrophages or simply encapsulated by ...
0
votes
0answers
20 views

off-target score: same scale as guide sequence score?

I have a basic question that I have not been able to find the answer for. I am designing sgRNAs with http://crispr.mit.edu/ The interpretation of scores for guide sequence goes easy (optimal is 100%, ...
1
vote
0answers
11 views

Is the “freeze response” really a remain of our reptilian past?

I'm looking for any reliable sources relating the common-known human reaction on a stressful situation, humans sometimes freeze and can not move. From some materials found on the internet I got that ...
1
vote
0answers
24 views

My BRIG run is suspiciously quick. What is a typical length of time for a run?

I use the BRIG (BLAST Ring Image Generator) program to compare prokaryote genomes. It executes a local BLAST+ and visualizes the results as rings around the reference genome. I downloaded three ...
1
vote
1answer
48 views

Cell cycle-regulated genes and mRNA

I am a mathematician and my knowledge about biology is close to zero. I am reading a bioinformatics paper and I would like to understand a bit more about the biology task they are talking about. I ...
0
votes
1answer
24 views

How do bacteria use oxygen for respiration and growth? [on hold]

I recently did an experiment with the rest of my class in which we had to see which of two solutions best aided a bacterium's growth. The bacterium had already undergone slight growth in the ...
-1
votes
1answer
23 views

What is the biological relationship between flowers and blossom? [closed]

According to Wikipedia, the earliest fossil records of flowers date to around 130 million years ago. But I can't find anything about blossoms in particular. Is there an evolutionary relationship ...
0
votes
2answers
38 views

Simple computational biology project for AP Biology class. Ideas? [closed]

Our teacher assigned us a project to do with an extremely open-ended prompt and it should be completed within a month. I was planning on doing something related to computation and evolution in terms ...
1
vote
0answers
32 views

Why are treatment periods with antibiotics longer than 1-2 days?

Antibiotics are given prophylactically for several indications (e.g. prior to dental surgery). Why are the treatment periods for prophylactic antibiotics much shorter than when treating an ...
0
votes
0answers
35 views

How is DNA digested by the human body? [closed]

Suppose I (a human being) eat some food? How would my stomach break down and digest the DNA in the food? I believe ultimately it should break down into and be passed out as uric acid but I'm not sure ...
3
votes
1answer
52 views

Is there selection against long proteins and long genes?

Background thought Titin and TTN Titin is the largest protein in the human genome with 33423 amino acids. Titin is coded by the gene TTN that must be at least $3 \cdot 33423 \approx 100kb$ long. ...
0
votes
0answers
16 views

How effective will the synthesized virus be without epigenetic marks?

Will a de-novo synthesize infectious virus be as effective as the natural one? How important are epigenetic marks for the virus and is there a mechanism to restore them?
0
votes
0answers
28 views

What were the camels' bumps good for back in the polar areas?

I've heard that camels lived in the North America formerly and just in the last few thousands years they've migrated to the hot deserts. Thus they allegedly utilized the adaptations against the cold ...
4
votes
1answer
59 views

What's the name of this bug?

A friend of mine found this bug in Germany. He sent the picture and asked if anyone knew what kind of bug it is. Since no one knew and I didn't find anything similar via google search, I decided to ...
3
votes
1answer
37 views

Is it possible to make a contagious cure to a virus?

In a TV series Ive been watching The Last Ship, - spoiler alert - a scientist develops a cure for himself for a virus, but actually continues to remain a carrier, and sort of weaponizes the virus ...
0
votes
0answers
11 views

Is there any study on odour remanence in human olfactory system?

does anyone here knows about at least one scientific study about how odours could impact human olfactory system and create some phenomenon that could be loosely compared to retina remanence? As an ...
0
votes
1answer
16 views

When do 3 germ layers form in embryo? And why is there only one mature egg formed?

During the process of pregnancy, when do the 3 germ layers form in embryo? Is it after formation of gastrula? Also, during oogenesis, why does only one mature egg form? Why don't use polar body egg ...
1
vote
0answers
13 views

mVenus fluorecent protein, life time? luminosity?

If fluorescence proteins get excited by radiation, how long does it usually take for the excitation to decay (at room temperature)? I guess, if the life time is too long, the luminosity will be very ...

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