0
votes
0answers
3 views

What's the cell, system or structure responsible for new species genetic code generation?

I always had this question in mind. I think, If humans find answer to it then we can trigger the next evolution of human specie. What is the cell structure responsible for evolution ? I don't mean ...
0
votes
0answers
7 views

The evolution of poor eyesight: is there weaker selection in modern humans?

Short question: Poor eyesight might have been a major impediment to survival and reproduction in early man (say, 100,000 years ago), but, with the advent of agriculture, major cultural changes, and ...
0
votes
0answers
10 views

Why it seems that principles of chemistry are not being applied in this biochemical process?

In the non cyclic electron transport consider splitting to two water molecules then 4e and 4p (p for protons) are generated in the lumen of the Thylakoid. Due to quininone cycles 8p are transferred ...
-1
votes
0answers
13 views

Why plants and animals are so different even though they come from the same ancestors?

All the documentaries I have watched, books I have read so far on the starting of life on earth only talk about animals. The very first life form on earth was bacteria. Then evolution took us this ...
0
votes
0answers
10 views

What’s wrong with a shriveled cell?

When you place a cell into a hypotonic solution, water rushes into it and it bursts/lyses. Thus, the cell dies. However, when you place a cell into a hypertonic solution, water rushes out of it and ...
2
votes
1answer
19 views

Why eyes don't get heated while converging sunlight into retina?

It is a common observation that a magnifying glass when used to converge rays of sun to a fine point in paper, the paper burns due to intense heat. Why doesn't this happen in our eyes? Our eyes are ...
1
vote
2answers
37 views

Are human beings evolved to eat meat? [duplicate]

I know humans can cook, and prepare almost anything, but are humans specifically adapted to eat meat. One of my doubts humans are not particularly well adapted to eat meat because they lack canine ...
1
vote
1answer
8 views

Ions in Stomatal Opening Mechanism

When a stoma’s guard cells try to swell and open the stomata, they actively pump out protons outside of the cell. This causes a membrane potential, where the inside of the cell is negative with ...
2
votes
1answer
18 views

Efficacy of the 10-20 montage for EEG

I am trying to better understand the relationship between the placement of EEG electrodes and the quality of the "brainwave" signals they produce. There is the standard 10-20 system which has me ...
1
vote
1answer
85 views

Would urination continue after death?

I apologize for the very weird question >.< but for some reason I started wondering this. I also probably phrased the title incorrectly. This seems to be on-topic according to the help center, let ...
0
votes
0answers
12 views

Why lactate inhibits growth (or enhances death rate)?

Extracellular lactate tends to inhibit cellular growth or enhance cell death. This happens in the vicinity of tumors and in cell cultures. What is the mechanism behind this effect of lactate? Why ...
0
votes
1answer
17 views

Converting miRNA names

I need to convert all of my microRNA names e.g. hsa-miR-30e-5p to e.g. entrez gene IDs, ensemble IDs or another ID. Does anyone know a good ID conversion tool for microRNAs? (I managed to convert it ...
2
votes
1answer
18 views

What is the number of influenza strains occurring at a given time?

My question was initiated by reading on mock-up influenza vaccines. I understand that the manufacturer pre-prepares a certain vaccine and tries to get it tested and ready before it is actually needed, ...
1
vote
0answers
20 views

Follow-up to The Red Queen by Matt Ridley? [on hold]

I just finished reading The Red Queen: Sex and the evolution of human nature by Matt Ridley. Since this book is over 20 years old, I was wondering if more recent research made part of the book ...
4
votes
2answers
22 views

Earliest to use media after autoclaving?

I am autoclaving media to use later to inoculate yeast. How much time do I have to wait before using the media and adding the culture? Can I use it a few hours after autoclaving?
3
votes
0answers
29 views

Escaping resource limitations during tumor evolution

In their discussion of the importance of r- and K-selection on tumors, Aktipis et al. (2013; figure 3) provide the following illustration of a hypothetical cancer growth curve: In it, you can see ...
1
vote
0answers
20 views

Why do I see the world in blue when I open my eyes? [on hold]

So I was standing outside, waiting for the train. I was tired so I closed my eyes for a while. Then when I opened them, the world was a lot more blue than it normally is - why is this? I tried it a ...
0
votes
0answers
7 views

Sprouted hulless barley producing acetic acid after several days in the fridge

After soaking of naked barley for 1 day, the barly did sprout in a room-temperature environment for 3 days. After having repeated this process for several times, one can say for sure that in a ...
0
votes
0answers
23 views

What happens to the mold spores we inhale?

What happens to the mold spores we inhale? I'm guessing when we exhale, many of them are expelled back out to the environment. But given that disease can be caused by mold exposure, I'm also ...
-1
votes
0answers
16 views

Can carbohydrates be peptides, nucleotides, phospholipids, or disaccharides? [on hold]

Can carbohydrates be peptides, nucleotides, phospholipids, or disaccharides? Explanation why please
0
votes
0answers
31 views

Heat Transfer in Heartbeat?

Heat is energy. Signal transmission has energy. Heart pumps and transmits energy. Heart has electrical and thermal transmissions. There are several processes which affects the heartbeat. The ...
4
votes
1answer
70 views

Why does snow not stick to the fur of wolves and some breeds of dogs?

This question made me wonder, why for example wolves don't suffer from these "paw snowballs"? (...) but after a few miles on the trails in soft snow, he often develops snowballs between his paw ...
0
votes
0answers
16 views

What is suction tension? [on hold]

I have come across the term and don't get the meaning. I'm seeking an explanation. I've seared the internet. Thank you.
0
votes
0answers
19 views

Types of fermentation? [on hold]

I read about several rarer forms of fermentation such as ABE, and heterolactic. What is the full list of all known types of fermentation, and what are the differences between them? Edit: I only want a ...
0
votes
0answers
9 views

What are the highest and lowest amplitude values in ECG for humans?

I'm currently trying to parse the records captured from an ECG device and display them on a mobile application. I am wondering what the highest and lowest possible amplitude values for ECGs are in ...
5
votes
2answers
287 views

Why do carnivores evolve?

If humans can live without consuming other animals, then why we do it; from a biological point of view, why do we eat meat? I would also extend the question to another animals, because many animals ...
0
votes
0answers
9 views

E. coli UV exposure?

What amount of UV can E. coli survive? Or how should I phrase my query when searching for research on this topic? I know that UVC will kill E. coli after an amount of time, but I'm not finding much ...
0
votes
0answers
12 views

Are there water conservation methods that increase waste instead of reduce it? [on hold]

For example, does improperly washing clothes lead to mosquito increases or other-organism morbidity? Does using dish water on the garden attribute to clean water more or more wasted water (is it ...
0
votes
0answers
14 views

Obtaining a mapping of RefSeq ACs to Uniprot ACs

I am trying to obtain a mapping for RefSeq Accession Numbers to Uniprot Accession Numbers. I can write a script to do this for a list of RefSeq ACs like this: ...
0
votes
0answers
10 views

Looking for hard cell segmentation problem

I am a physicist working on a new image segmentation technique, and I would like to test it by segmenting some images with low-refined cells on a noisy background... Do you know where I could find ...
0
votes
1answer
32 views

When you take a very cold or hot bath how is that influencing your breath?

It looks like when you take a cold shower or bath your vains are getting smaller and when its hot your vains are getting wider. But is that wright and do you need to take a breath more in both cases ...
-1
votes
1answer
33 views

How is CO2 related to acidity?

In a plant cell why does increase in concentration of CO2 increase the acidity of the cell sap. Thank you
0
votes
2answers
41 views

Structure of Cell

Are cells spheres or ovals/circles bound by phospholipidbilayer? If they are spherical how are we able to see the nucleus through the phospholipid bilayer under a microscope?
0
votes
1answer
20 views

What happens if both forward and reverse primers have same Tm?

One of the key rules in primer designing is that Tm (melting temperature) of forward and reverse primers should be in the range of ±5°C. For example, if ...
2
votes
1answer
36 views

Is there an acceptable term for 'male fox' other than 'dog'?

I'm writing a lab on sexual dimorphism in Arctic foxes. As such, I use the words 'dog' and 'vixen' fairly often. In the discussion section, I compare the results from the lab with the results from ...
1
vote
0answers
18 views

mRNA extraction from mice ears.

I am trying to extract RNA from mice ears and for some reason I don't have RNA when I perform the electrophoresis. I directly cut the ears and I put it in a tube with a bead and trizol. then I place ...
3
votes
1answer
34 views

What is the function of the polar bodies produced during oogenesis?

Why are polar bodies produced during oogenesis in human females? I read that polar bodies are produced during meiosis so that the oogonium (or gamete mother cell) can be converted into a haploid ...
1
vote
0answers
13 views

Database/Reference on optimal conditions for plant growth in greenhouses [on hold]

We are a group of computer science students currently working on a university project to create a (almost) self-sufficient greenhouse. The hardware and software aspects being almost finished, we ...
0
votes
0answers
3 views

How to incorporate intraspecific variation in discrete characters in comparative analyzes?

I'd like to run a multivariate analysis (Pavoine et al. 2011) that aims to disentagle the effect of environmental gradients on traits, considering its autocorrelation with phylogeny and space. It uses ...
1
vote
0answers
38 views

why does brain produces noise? [duplicate]

when i look at a white wall i see little colored dots moving in circles filling my whole visual view, just like the static on a tv but then in color. I thought everybody had this but recently i ...
3
votes
0answers
19 views

What, if any, experimental evidence is there that flies rub their legs together in order to clean them? [duplicate]

Everybody's seen a fly rubbing its hands together like Mr Burns. And almost everybody's heard the standard explanation - that it's cleaning itself. Now, this is certainly a very plausible explanation, ...
0
votes
0answers
14 views

When your gut fauna is being created, does it evolve from existing external fauna or change population as external fauna arrives [on hold]

During childhood your gut fauna gets populated from the environment and the people you meet. Unlike baby koalas, we do not eat our parent's faeces to populate that fauna. The environment in your gut ...
0
votes
0answers
6 views

Oligomeric states of Phyre model

Is it possible to generate an oligomeric state for a phyre model? As it lacks crystal packing information "Generate>Symmetry_mates" obviously does not work in PyMol. I assume that the fit is not ...
0
votes
0answers
26 views

Difference between genetic adaptability and micro evolution? [on hold]

Do both occur at individual level? And which among the two is responsible for a species to maintain its specificity?
0
votes
0answers
12 views

Cloning Stragedy

Recently I am learning about TOPO cloning in a class. I have questions regarding to this: In the TOPO-TA cloning, they use topoisomerase I to cut the backbone of the vector so it will covalently bind ...
0
votes
1answer
50 views

What are most common natural causes of death?

What are most frequently occurring natural causes of death?
0
votes
0answers
7 views

Placental Adherence and Premature Heartbeat

I am studying the placental adherence in premature fetuses i.e. from 22nd week to 38th week of gestational age. About 60% of placental adherences are diagnosed during labour, which increases the risk ...
0
votes
0answers
21 views

Does the source of caffeine affect the biological impact?

I've recently decided to give up my morning coffee in lieu of a caffeine pill. Both are around 200mg (my Tim Horton's XL 4x4 was 240 mg of caffeine) of caffeine. We were talking about the various ...
0
votes
1answer
21 views

Concentration of a specific promoter in a cell?

I want to simulate transcription activation by a given transcription factor (TF) with known kinetics. The binding rate $k_{on}$ is given in $\mu M^{-1} s^{-1} $, describing a bimolecular reaction ...
0
votes
0answers
17 views

What is the effect of sodium chloride on head lice?

There are a lot of products that claim to kill lice and eggs. The main ingredient is sodium chloride. How does it work? I wonder if it has something to do with osmotic effects?

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