All Questions

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0answers
6 views

Why are babies rarely born with cancer?

Childhood cancer is fundamentally a disease of dysregulated development. Why does it rarely occur during the fetal period, a time of enormous growth and development?
0
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0answers
7 views

Why are viruses considered to be non-living? [duplicate]

Viruses are widely known as disease and illness-causing agents that can spread quickly through living organisms. They are considered to be non-living due to their unique characteristics.
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0answers
10 views

Using high risk pregancy to advantage

If a woman over 40 having a child with increased risk of the child having down syndrome decrease the chance of that child developing cancer later in life?
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0answers
10 views

Why does one have to be alive to donate stem cells?

Even after The body dies ( meaning the heart has stopped pumping) some cells continue to generate weeks afterwards. So why is that you need to be alive to donate stem cells?
0
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0answers
9 views

Can a human survive a sting from Androctonus Australis sting?

So my question is their any treatment for Androctonus venom or do you just have to wait it out, or do you just die from it?
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0answers
5 views

What is the difference between numerical and phylogenetic taxonomy?

I am a 15 year old boy,who started developing an interest towards biology recently. I am interested in these two schools of taxonomy. Thank you for all the answers!
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0answers
9 views

Is it possible to make an estimate of how many species extincted before humans?

This article Species Extinction Happening 1,000 Times Faster Because of Humans? makes an estimate of the rate of extinction now and 200,000 years ago. I know it's difficult but since there are ...
0
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2answers
10 views

Are SNPs always in linkage disequilibrium with other SNPs

Is it possible to have a SNP that is not found is be non-randomly associating with any other SNP?
-2
votes
1answer
27 views

How much does biomagnification affect human beings?

It is known that the effect of biological magnification increases with higher trophic levels. Since, we are at the top of the food chain, how much are we affected by it? Is there any proof of humans ...
0
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1answer
15 views

Coronary circulation

It is said that the coronary artery that gives the posterior descending artery(PDA) determines if the heart is right dominant(most cases) or left dominant. Is there any reason to this? Why PDA?
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0answers
12 views

How do I homogenise a small pellet of 10 to 50 cells within less than 50 µL?

I have a problem with declumping/ homogenising bacterial cells in small volumes (10 to 50 µL). I know that I can get all of my cells out of the tube, but they are still stuck together and won't form ...
-2
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0answers
20 views

How do people get golden blood type?

The RHnull phenotype is characterised by a complete lack of all Rh antigens (source). Because it is so rare, it is sometimes called "golden blood type". My question: If for example one person has O ...
-1
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0answers
5 views

What software is similar to STRAF, Structure and R Geneland for ethnography and forensic haploid Y data?

What software is similar to STRAF, Structure and R Geneland for ethnography and forensic haploid Y data? Does anybody know a better and more functional choice?
1
vote
1answer
15 views

When are neuropeptides loaded into vesicles?

It is well known that small neurotransmitters like monoamines (dopamine, serotonin, etc), acetylcholine, glutamate, etc are loaded into vesicles at the axon terminal. Stated differently, synaptic ...
0
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0answers
37 views

How many nutrients do trees process daily?

Is this tree fact below that I have found on social media sites true? I don't know the source of the quote. It's pretty amazing. I'll be glad if someone can provide the source too! Natural Wonders ...
0
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0answers
26 views

How are electrical properties differently applied to the soma of a neuron and the axon of a neuron? [on hold]

I have provided two pictures to help clarify my question: As you can see from the above two images, the values in the two tables are the exact same. Summarizing, the larger soma and larger myelinated ...
0
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0answers
7 views

Animal reproduction when resources are scarce

(This question is aimed at animals that take care of their young, e.g. dolphins.) As I understand it, most animals reproduce if possible. The only way they don't is because they run out of resources. ...
0
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0answers
7 views

Trophic levels and energy loss

Just a general question about trophic levels. Traditionally, it's thought as much as one order of magnitude of energy is lost as one moves from trophic level to trophic level. I am confused here since ...
-1
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0answers
18 views

In theory, how would genetic engineering of certain genes affect morphology/phenotype of individuals in adulthood? [on hold]

Say we get to the point where we then can identify all of the correct genes/combination of genes and etc. that are responsible for things like zygoma, maxilla, mandible, frontal bone, etc. shape (...
0
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0answers
23 views

Monkey Grip Procedure?

How the monkey grip procedure performed about the arms is able to cause a greater stretch reflex response in the leg for the same amount of sensory input when compare to a response without the monkey ...
-2
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0answers
21 views

To what extent is the angle of the mandible genetic vs. epigenetic?

Is there any scientific literature or studies that can confirm whether the angle of the mandible and/or gonial angle are more strongly influenced by genetics or epigenetics, AKA puberty/hormones/...
-3
votes
1answer
24 views

A speculative question about sensation

I know this is rather speculative and I am not a biologist, but I have womdered about this for a long time. I have always been able to pinpoint the central line of any part of my body exactly as if ...
-2
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0answers
8 views

Simple models of menstrual hormone levels

Are there any simple models available that can predict hormone levels (e.g., estrogen, progesterone) over the menstrual cycle? It would be nice if these were already implemented in Python, but any ...
0
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0answers
8 views

Pits, symplastic or apoplastic pathway?

After water has moved through the endodermis through the Casparian Strip, water continues to move down the water potential gradient into the xylem vessels through the pits, is movement through the ...
2
votes
1answer
11 views

Formula for Oxygen Consumption for Atlantic Salmon (Mathematical) - insecurities regarding variable

The oxygen is calculated in mg per kg per something, so what does $h^{-1}$ stand for? hours maybe? The formula given below is an estimation of oxygen consumption for Atlantic salmon \begin{...
0
votes
1answer
52 views

Why is sex hurtful for some animals but pleasurable for others?

Sex seems to be pretty hurtful for feline for example. On the other hand sex is pleasurable for humans. Why is sex pleasurable for some and not for others? How do these things evolve?
1
vote
1answer
17 views

Where does the gluteus medius attach to the greater trochanter compared to the gluteus minimus attachment?

Where does the gluteus medius attach to the greater trochanter of the femur compared to the gluteus minimus attachment? Is it above, below, next to it, etc.? Ideally I'd like to know the distance as ...
1
vote
0answers
21 views

DNA replication in $ E.coli $

$ E.coli $ has circular DNA which I guess implies one strand forms the outer circle and the other the inner one. So, is there a way to know if the replicated DNA forms the outer or inner circle? In ...
5
votes
1answer
47 views

Why do larger diameter myelinated axons have greater conduction velocities than small diameter myelinated axons?

A canonical statement I have frequently read is that "large diameter axons conduct action potentials at faster velocities than small diameter axons". After recently learning the effect of increased ...
0
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0answers
26 views

Are large cell bodies of neurons harder to depolarize than small cell bodies of neurons?

In order for the axon to initiate an action potential, we know that the axon initial segment must be brought to threshold. So my question is as follows: Say we have the minimum charge input, "X", ...
0
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0answers
8 views

Are deer ticks primarily active in bedding areas?

I know that with fleas, they tend to lay their eggs on the host and the eggs fall off into bedding areas, so the bedding areas are sort of the epicenter of a flea infestation. Is it the same with ...
0
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0answers
9 views

Distinguishing Dermis and Epidermis Layer

Hello, I have two histology slides of my skin equivalent samples that I received recently and was not sure if I was identifying my parts correctly. I just wanted to confirm that the most of my skin is ...
0
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0answers
23 views

What is the difference in the electrical excitability between a “large diameter soma” and a “large diameter axon” [on hold]

There are two stereotyped statements that I have seen during my coursework regarding electric properties of neurons: Large diameter axons propagate action potentials more quickly than small diameter ...
0
votes
1answer
20 views

Computational approaches for making hypotheses about the effects of genetic engineering? Experiment planning methods?

Let's assume that I am searching for gene editing candidates for curing human adiposis. Are there computational frameworks that can allow me to select the best candidate-genes for editing via some ...
1
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0answers
17 views

Is this an asian hornet

My mother found a hornet at home (in northern France) that is probably building a nest. Is that an asian hornet? If yes, how can I exterminate them?
-1
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0answers
7 views

Honeycomb looking eggs on tree

[I took this picture outback of my house in Plymouth Meeting PA . It’s on our tree and we don’t know what it is ] (https://i.stack.imgur.com/QyfZM.jpg)
1
vote
0answers
19 views

Is complete dominance actually a genotypic process?

An example often stated for codominance is blood groups, where both alleles version of the protein is expressed and can be found in the cell membrane. An example of incomplete dominance often given ...
1
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0answers
14 views

Tiny huntsman found in Czechia?

I found this spider today and I'm curious to know what it was. Discovered today at 14:27 CEST, about 200 meters from Hamr pond, Prague, Czech Republic. It may have been carried all the way from the ...
3
votes
1answer
16 views

What is the meaning of expansion of T cells?

In immunology, what does it mean by the term 'expansion' of T cells ex-vivo and activate it (generally with reference to cancer immunotherapy)?
3
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2answers
31 views

Are mitochondrial genes decoded in the same way as nuclear genes?

Mammalian mitochondrial genomes contain only 22 tRNA-coding genes, which is an insufficient number to decode mRNAs under the standard wobble rules. How is translation of mitochondrial mRNAs achieved ...
1
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0answers
20 views

Techniques of molecular medicine/biology for aesthetic medicine?

Are there scientifically valid methods (possibly in the developmental stage) that can be used for aesthetic medicine. Usually surgical of physical therapies are used for aesthetic medicine, but ...
3
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0answers
13 views

What phosphorylates tau protein & and what causes tau to be phosphorylated?

I want to know what phosphorylates tau protein and its 6 isoforms. I know kinases cause phosphorylation events, and in tau it can be phosphorylated in a healthy neuron in the trans conformation, but ...
-1
votes
0answers
23 views

Molecular biology [duplicate]

Does every protein start with methionine? The start codon is AUG (which corresponds to methionine),then why doesn't the methionine present in the protein after the translation has done. I have ...
0
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0answers
26 views

Where is the cartilage plate in this electron microscope image of the trachea?

Also how could you tell? Assuming you were shown a photo of the cartilage only, how would you identify it?
0
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0answers
13 views

Effects of urate oxidase in humans

What are the overall effects of urate oxidases like pegloticase in humans? Which of those effects are due to higher levels of allantoin?
3
votes
1answer
17 views

Why do chain identifiers in PDB have no standard starting chain id type?

At first I assumed that PDB chain identifiers are just uppercase letters (A, B, C,..) but found out there are protein chain ids that are numbers (0-9) and lowercase letters as well. For example, ...
0
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0answers
11 views

How is minute ventilation any different than ventilation rate?

The equation used to calculate both of these is the same: Tidal Volume * Breathing rate/Frequency of breathing. Then how are they any different ?
0
votes
0answers
23 views

Why does my face feel numb after eating an apple? [on hold]

Whenever I eat an apple (I don't know if only certain sorts cause this, unfortunately), my upper cheeks first feel flushed and warm, as though there is more blood flowing towards that part. Then, ...
4
votes
1answer
41 views

At What Rate Do Ions Leak Out of a Plasma Membrane Segment That Has No Ion Channels?

In reading about the purpose of myelin during action potential propagation, I came across a point of confusion. From what I understand, one of the primary "benefits" of myelin is that it aids in ...
1
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0answers
16 views

What is the smallest known viviparus

I want to know what is the smallest viviparus known at this time. I was Googling, but I can discover this animal. Thanks.

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