0
votes
0answers
5 views

What is the difference between a predator and a parasite?

A human encountering a tiger or a malaria plasmodium is likely to suffer, and the tiger/plasmodium is likely to gain from the transaction. Not necessarily a good example, and I am aware that a ...
1
vote
0answers
6 views

Opening and Closing of stomata

Which is the more accepted theory for the opening and Closing of stomata : the sugar concentration theory or the k+ ion theory ?
0
votes
0answers
4 views

pressures relating to osmosis

I Have googled this out but no where found a satisfactory answer . These 2 questions have been troubling my mind since 2 months :: A)which is the pressure responsible for the movement of water up to ...
0
votes
1answer
9 views

Plasmolysis vs Flaccidity in cells

When is a cell said to be flaccid and when is it called plasmolysed? So far I found that there is a specific relation to osmosis.
-1
votes
0answers
11 views

Band is not available. Why?

I confirmed the GFP-fused protein by fluorescence microscopy. The molecular weight of the protein is 123 KDa. I used 10% SDS-PAGE. I washed the nitrocellulose membrane 3 times with 10 mins each. I ...
-1
votes
2answers
26 views

Can all elements be found in our body?

There are many Natural occurring atomic elements. Can they all be found in the human body?
0
votes
0answers
8 views

Dihybrid Cross Help Please

lobe eyes female x crossveinless wing male F1 Progeny: Female lobe eyes: 5023 Male Lobe eyes: 4931 F2 progeny: Female wild: 1241 Male wild:630 Female lobe eyes:3803 Male lobe eyes:1892 ...
0
votes
0answers
15 views

Why is the middle finger longer than the others? [duplicate]

Possibly it has to do with making the hand shaped more symmetrically (in a sense as a spear) when the hand is flat with the fingers closed together? Or has it to do with the length of the metacarpal ...
0
votes
0answers
14 views

What environmental pressures impacted the evolution of the frog from the Osteolepis?

What environmental pressures impacted the evolution of the frog from the Osteolepis? osteoplepis - Ichthyostega - Eryops - Labyrinthodontia - amphibians
0
votes
1answer
30 views

Are there specific non-protein substances that pathogens release into their host?

Reading research articles, I have found out that proteins called effectors get released into the host cell when a pathogen attacks a host. My question is, whether pathogens also release non-protein ...
0
votes
0answers
3 views

Which ingested allergens can be transferred to a partner via bodily fluids?

Can some allergens, such as peanut traces, appear in bodily fluids (saliva, sweat, semen, vaginal secretion) after ingestion? I would like to know in particular intake of which allergens should be ...
0
votes
1answer
16 views

Does CoA always bind to organic molecules through a thiol bond?

Does CoA always bind to organic molecules through a thiol bond? Sometimes I see it written as SCoA in textbooks but sometimes it's just written as CoA, are those actually chemically different, or just ...
0
votes
1answer
27 views

Do bacteria grow on pure dry glucose?

I've accidentally touched pure glucose with my bare hands (fingers to be specific), which was intended for cell-culture. I'm worried that bacteria from my skin may start to grow on the glucose and ...
0
votes
1answer
25 views

Why does a dichotomous key offer only two choices at each step?

Why does a dichotomous key offer only two choices at each step? Is it mainly for simplicity?
3
votes
0answers
17 views

How does the brain know what to remember and what not?

People remember some information for example when learning for an exam, or remember to go to a shop after work etc., but we don't remember usually much other stuff like people passing us, what was the ...
1
vote
0answers
27 views

If life is found on Mars, what can be deduced about its possible common origin as Earth life? [on hold]

Assume that life is found on Mars, or anywhere out of Earth where it can be sampled and closely studied. Would we know if it is related with Earth life? By what primary means, what characteristics ...
1
vote
1answer
48 views

Do different emotions produce different tears?

Do tears of joy, laugh, grieve, and others contain different things or are they all the same?
2
votes
2answers
40 views

What is the most appropriate way to normalize gene expression data?

This question comes because reading a paper about normalization of gene-expression data, is not clear if the method for normalize the data is just for RNA-Seq data or could be applied also for ...
3
votes
0answers
14 views

Extiction of non-mammal Synapsida

I am following M.J. Benton's Vertebrate Palaeontology, which explains how many groups of Synapsida were already extinct in the Mesozoic Era, with one obvious exception being the group of Cynodontia, ...
0
votes
0answers
9 views

Are cells constantly recycled in major parts of body?

I already had similar question about atoms: Are all body atoms really recycled several times during a life? Now I would like to know about cell level. Are cells constantly divide and die in all ...
1
vote
0answers
12 views

Why human hair is losing its color over time? [duplicate]

Human hair is losing its color over time, that's a known fact. I would like to know why, meaning what biological processes are involved in this? Also, is it part of the DNA somehow, i.e. the exact ...
0
votes
0answers
21 views

Plants and thermal cameras?

I was wondering has there been any work done with plants and thermal cameras? I know in humans inflammation shows up as a warm spot using a thermal camera. Do plants have a similar effect? If so ...
0
votes
0answers
23 views

What is the difference between a hormone and a drug?

This question is based primarily on definitions. A common dictionary definition is that a drug is: any substance other than food, that when inhaled, injected, smoked, consumed, absorbed via a ...
0
votes
0answers
16 views

Why do birds in this time of year start singing so early?

I noticed that birds in the beginning of may start singing very early. Earlier than in other months. Why would this be?
2
votes
0answers
28 views

Why do people tend to stand on one leg? [on hold]

I know for a fact, by observing people and from own experience (you can try it yourself while standing, but not too consciously and in a loose way) that they (like birds), while standing, tend to do ...
0
votes
0answers
51 views

What is the Ramachandran z-score of a denatured protein?

I thought it should be 0, but the professor pointed out I was wrong. What should the Ramachandran z-score of a denatured protein be?
0
votes
0answers
15 views

Cells of Zona pellucida

My textbook states: Blastocyst hatches out by lysis of Zona pellucida with the help of the enzyme strypsin, Later the cells of Zona pellucida gradually disappear. We know that Zona pellucida is ...
0
votes
1answer
19 views

Cell division - meiosis

Really confused. How many chromosomes pairs do humans have in their sex cells? How many single chromosomes do humans have in their sex cells?
2
votes
1answer
31 views

How many rounds of TCA Cycle would a complete oxidation of a triacyl(15-Carbon fatty acid)-glycerol, give?

This was a trickier question on a previous test, and I'm still not sure why, but the answer was "at least four". I answered "more than 22" and got it marked wrong. I assume that each fatty acid chain ...
2
votes
0answers
19 views

Does the edge effect promote biodiversity?

I define the edge effect as: A term used to describe what occurs at habitat boundaries where two bordering communities influence one another. My question is whether it generally leads to an increase ...
3
votes
1answer
19 views

Moth with silver marking on wings

This is a moth that we found on a curtain inside the house a couple of days ago. Unfortunately, these pictures did not come out as well as I thought before I realized it outside. But I was struck my ...
0
votes
0answers
5 views

Serological assays measuring antibody response

Given that an appropriate immune response to a bacteria may be thwarted in an individual, including not producing all of the antibodies which are known to occur in people who have been infected, or ...
0
votes
1answer
20 views

Why is chronic lymphocytic leukemia (CLL) most common leukemia in the West but so rare in Asia?

In "Advances in Chronic Lymphocytic Leukemia" (2013, Edited by Sami Malek), several times it is stated that CLL is very common in Western countries. However, it is quite rare in Asia. (I do not have ...
0
votes
0answers
7 views

What did William Harvey discover from experimenting with deer?

On his wikipedia page, I read the following: In particular, Charles' hunting expeditions gave Harvey access to many deer carcasses; it was upon them that Harvey made many observations and ...
3
votes
2answers
27 views

Exponential growth equation and bacteria

I'm a microbiologist, but I'm teaching some ecology in my intro-level course, so when we got to population growth, I thought I'd use the example of a microbial population. But, I hit a strange problem ...
0
votes
0answers
22 views

T cell sensitivity and persistence to specific bacterial proteins [on hold]

Currently, the standard tests for Lyme Disease measure antibody production after exposure to a bacteria, Borrelia burgdorferi. Often, the tests are performed too soon after infection, before ...
-2
votes
0answers
71 views

Why does fart temperature vary? What's the hottest fart ever recorded? [on hold]

I read somewhere that the average fart temperature is equal to the average human body temperature: 98.6 degrees Fahrenheit. Sometimes I experience hot farts, while other times my farts are like a ...
0
votes
0answers
26 views

Chemical colouration and carotenoids [on hold]

How does Carotenoids obtained from diet become an important part of chemical colouration in animals?- What happens after carotenoids enter the body through diet till they cause body colouration? Some ...
0
votes
2answers
38 views

Geographical distribution of malaria and tuberculosis

Unlike malaria, tuberculosis (TB) is found across the whole world. Why and explain? I mean why are people affected with TB more than malaria and some say that in cold and developed countries malaria ...
0
votes
0answers
27 views

Rate of diffusion

I need to find out the intial diffusion rate across membrane. I know the formula of J=DA(C1-C2) but i am confused about how to make the calculations I also know the following: 1) Na+ concentrations ...
0
votes
0answers
7 views

Is salivation decrease during sleep beneficial?

Papers [1, 2, 3] tell that a salivation decrease is not only unpleasant, but harmful for dental health. What cause that decrease? What is the reason for it and do animals have it? I guess it's a ...
0
votes
0answers
3 views

Where do I find the label, whether this file data corroborates to a healthy tissue or a cancerous one in TCGA data?

I downloaded the TCGA dataset for LUAD (Lung Cancer), I find each file with miRNA sequence data like readCount and parts per million value and their are around 123 samples. But where do I find the ...
1
vote
1answer
16 views

Are there any (chemical) processes occuring inside a seed while it's in a dormant state?

If a seed were in a glass jar without a chance of germination, are there any (chemical) processes occurring inside the seed while it sits there? My intuition tells me no since my understanding of ...
1
vote
1answer
32 views

Are ribosomes assembled in rough ER and Golgi body, or in the nucleolus?

I mean all the components, such as ribosomal RNA (rRNA) are synthesized in the nucleolus, but is the whole ribosome structure assembled in the nucleolus or is it also done in the rough endoplasmic ...
0
votes
0answers
10 views

About Hermaphrodite Mitochondrial Inheritance

From the textbook I've learnt that in general mitochondria are inherited maternally. However if the cross is between hermaphrodites (e.g. in C.elegans), where, in most cases, then should the ...
2
votes
0answers
24 views

Can you suggest me some books/articles about how female birds indicate receptivity to copulation? [on hold]

Where can I find informations about the topic? I need to find some examples. I also really need this particular information: I know that many female mammals display lordosis behavior that indicate ...
3
votes
0answers
32 views

Did the Great Oxygenation Event also cause a mass extinction?

Its usually assumed that the Great Oxidation Event around 2.3 bya caused a great extinction of anaerobic life on earth. But as I was reading Nick Lane's book, ...
0
votes
0answers
10 views

Pressure produced by blowing with mouth

I need some figures on the pressure humans are capable blowing with their mouth with zero flow. I only need very approximate figures. I'm guessing around 500mm of water? I haven't got a tube handy to ...
0
votes
0answers
14 views

What is the most important factors that affect our taste?

What ist the most important factor that affects our taste? our mood? (such like GERD) our genes? (more mascular people will need more protein) the food we ate recently? (to choose more diverse ...
0
votes
0answers
11 views

How can I apply any machine learning model/classifier on miRNA seq data?

I recently got micro RNA sequencing data from the TCGA. I am currently trying to early detect Mesothelioma. How is microRNA seq data different from microRNA expression data? MicroRNA expression ...

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