3
votes
1answer
103 views

Insect ID, Maharashtra, India

could someone please identify this insect? This photograph was taken in the Western Ghats of Maharashtra, India, near the town of Mahabaleshwar. Hemiptera was about as far as I could get using other ...
8
votes
1answer
402 views

Insect identification, Chennai, India

could someone tell me what the name of this beautiful insect is? Location: Chennai, India. Thank you!
-1
votes
1answer
81 views

Will moths evolve to become blue if we paint walls in blue?

I know dark moths are more frequent than white moths when the environment is full of dirty (dark) walls/trees; it is a consequence of natural selection. Will moths evolve to become blue if walls/trees ...
2
votes
0answers
23 views

“Antibiotic resistance” equivalent in archaea for selection during cloning

I'm beginning to work with halophilic archaea and I'm trying to figure out a good way to select for cells that have taken up a plasmid. Obviously, one can't use antibiotic resistance since they are ...
5
votes
1answer
40 views

Does the human body metabolize what it smells, even in trace amounts?

I conjectured to a friend that some small amount of anything we smell is likely metabolized by the body. He disagreed. My thinking is that, if you are smelling something, some portion of molecules are ...
0
votes
0answers
25 views

Effect of cellular phone towers on human health

We live in world of mobiles, tablets, PCs and other electronic gadgets. We are continuously exposed to radio frequencies and other cellular frequencies. Generally these all waves are with very low ...
1
vote
0answers
28 views

Since nature highly favors the pyranose forme of Ribose, what explains the fact we find it in the form of furanose in DNA and RNA?

I read in my notes that relative abundance of ribopyranose represents about 80% of all ribose in solution (including the alpha and beta anomeres). I'm curious as to why evolution favored the use of ...
1
vote
1answer
40 views

How to correctly and accurately identify a few species of trees from their leaves(including multiple leaves and part of the branch)?

I want to identify a tree from one of the 12 species listed based on observing their branch and leaves. Is there quick and neat way to do it? Red Oak, White Oak, Red Maple, Striped Maple, Tulip ...
6
votes
1answer
62 views

Why doesn't telomerase activity cause DNA to get longer each time a cell undergoes DNA replication?

Telomerase extends the ends of the lagging strands in order for all of DNA to be be copied. Doesn't this also mean that DNA gets progressively longer each time it undergoes replication? Why is this ...
0
votes
1answer
56 views

which organelle produce glycogen phosphorylase and why

I know that Glycogen phosphorylase doesn't produce from rough endoplasmic reticulum in liver cell. But almost every proteins such as insulin receptor, serum albumin, and lysosomal enzyme have to ...
1
vote
1answer
50 views

Was the Okazaki fragment experiment ever replicated?

Prof said that the experiment "proving" the existence of Okazaki fragments was never replicated. Is this true? I tried looking on Google Scholar and I cannot find any experiments talking ...
1
vote
0answers
91 views

Why do my 23andme results only show me as 8.2% Scandinavian? [closed]

I just got my 23andme results back. My paternal grandfather was full Swedish. Shouldn't that make me 25% Swedish? 23andme tells me I'm only 8.2% Scandinavian. Or maybe my father inherited less than ...
0
votes
0answers
15 views

Rates of evolution of mitochondrial genes

I am interested in knowing the rates of evolution of different mitochondrial genes (in base pairs per million years) across different taxa. Has there been any publications along these lines ?
5
votes
0answers
175 views

What are the branches of system ecology?

What are the branches of system ecology that scientists research in nowadays? Or what can system ecology can applied to, or be used? I have read its Wikipedia page, but sadly it doesn't answer my ...
0
votes
0answers
40 views

Please help me to identify this plant?

This is quite common in vegetations near swamp areas in Bangladesh.I have included multiple picture hope that compensate for the bad quality.
4
votes
2answers
468 views

What is the name of this flower?

This is from Bangladesh though I am not sure it's native here
3
votes
2answers
53 views

What signals a ribosome to stop production when the cell is out of available amino acids?

In the production of a protein molecule, there have to be a ready supply of free-floating amino acids. When a given codon for adjoining, say, serine comes up, how are the serine molecules found out of ...
1
vote
0answers
24 views

Zygote Implantation and Pregnancy Detection

In a normal pregnancy, the embryo (blastocyst) implants between 8-9 days after ovulation. My understanding is that it is able to implant because the fertilized embryo produces a hormone that triggers ...
3
votes
0answers
48 views

What is a common body composition in mammals?

The Physiology Of The Racing Greyhound states that most species have about a 40% muscle mass to body mass ratio. Understanding Body Composition puts "optimal fitness" in humans at 16-25% body fat for ...
0
votes
1answer
74 views

The biggest underground living animal

It's easy to find informations about the biggest animals at land / at sea / in the air. But what was the biggest animal that ever existed, that lives underground? No animals that were forced to live ...
5
votes
0answers
70 views

Help Identifying Tree

I live in the upper southeastern region of Arizona in U.S. There's a type of tree growing in my back yard that I can't seem to identify. Its growing in an arrangement very similar to an ocotillo ...
0
votes
0answers
26 views

Why is all life organized in species? [duplicate]

My question is simple: why is all life organized in species having more or less peculiar features, and we don't observe a multitude of related descendants evolve seamlessly in a continuum of diverging ...
1
vote
1answer
21 views

Ways to identify that proteins are regulating different genes experimentally

As part of my study I have been given this hypothesis: HIF 1a and HIF 2a regulate different genes in multiple myeloma What ways do we have to identify that these proteins are regulating ...
2
votes
1answer
67 views

What is biological intuition?

Whenever I read or learn about prediction tools or aligners or motif detectors, I also hear that they are lacking in something called biological intuition. But I haven't been able to find a solid ...
1
vote
1answer
81 views

An alternate cure for AIDS?

Is is possible to cure AIDS patients by using white blood cells of blood cancer, by fooling HIV to attack a false target? Is it possible to wrap HIV in a physical boundary, such that it has no ...
1
vote
1answer
43 views

Do the effect of inbreeding depression disappear after the first generation of outbreeding?

An animal that is the result of generations of inbreeding tends to have lower fitness. (More diseases etc.) This is usually explained by harmful but recessive mutations that exist in all populations, ...
5
votes
2answers
1k views

Living intermediate species?

Hypothetical question regarding three animals 'species' {A, B, C}. Are there any examples in nature where {A and B} cannot regularly produce viable offspring, however {A and C} and {B and C} can ...
0
votes
0answers
14 views

Growth of Yeast in Different pH Mediums

Will yeast grow better in acidic, basic or neutral mediums? Why? Will the medium affect the growth of yeast? (Yeast cell membrane is semi-permeable).
0
votes
0answers
31 views

Virus affecting eukaryote and prokaryote

I learned that viruses can affect a wide range of species, leading to horizontal gene transfer between them. This lead me to winder whether viruses can affect both a prokaryote and a eukaryote. I know ...
1
vote
0answers
40 views

Chance of passing a risk allele to child?

Our genetics professor has posted up working for previous examination answers, but I am unsure that one of his answers is correct. My answer is close but may just be due to co-incidence. Question: ...
3
votes
1answer
115 views

My hand was stabbed with a pencil tip 10 years ago - why is the graphite still visible?

I, and multiple people that I know, have permanent marks (up to 30 years) from a graphite pencil puncturing the skin. The palm of my hand still shows a very clear mark where my hand was punctured by a ...
2
votes
0answers
104 views

Identification of an insect found in South India? [closed]

What is the name of this insect? I Found this creature in the night time. I removed old image & updated my image of same insect. Place: South India Time: Morning
3
votes
2answers
75 views

Why APC's present antigen to T cells?

the macrophages are pretty known well for antigen presenting process and to present the antigens which are bound to pathogens unlike exotoxins (which are free) the pathogen first should be digested ...
1
vote
0answers
28 views

Enrichment of slow growing microbes: Large Test Tubes as an alternative?

Well, i would like to enrich bacterial and archaeal ammonia oxidisers from soil samples using Minimal Salt media. They are slow growing microbes. I would like to enrich them with the aim to produce ...
3
votes
2answers
600 views

What magnification do I need to see blood cells?

If I want to buy a microscope for my kids to be able to view single celled creatures and blood cells, about what magnification is required? A Celestron Pentaview digital scope claims up to 600×. Is ...
0
votes
1answer
38 views

What are the reasons that soap has so different smell and flavour?

Everybody has tried to taste soap in their childhood. One would think that if soap has a tasty smell it would have tasty flavor too. But we know it is not true (in the common cases). But why is there ...
1
vote
0answers
51 views

Genetic mapping problem

A prototrophic Hfr strain of E. coli with the genotype trp+ purB- pyrC+ is conjugated with an F- strain with the genotype trp- purB+ pyrC- . The trp gene is known to enter last. The following numbers ...
1
vote
2answers
53 views

What are the differences between carnitine forms?

I've heard of L-carnitine, acetyl L-carnitine and L-carnitine L-tartrate. What form(s) occur in meat? What form does the human body manufacture? Is L-carnitine just a shortened name for L-carnitine ...
0
votes
1answer
120 views

Why do we breath oxygen? [closed]

I like this contradiction. But seems like my Biology teacher doesn't. If oxygen oxidates us, why do we breath it? Why can't we evolve into a new kind of human being that breaths other component of ...
9
votes
1answer
899 views

Do mantises stalk cicadas?

The Chinese Idiom The mantis stalks the cicada, unaware of the oriole behind (螳螂捕蝉,黄雀在后), which the story behind the idiom comes from Shuo Yuan(说苑), refers to those who are attracted by immediate ...
1
vote
0answers
162 views

Why do some white blood cells have lobed nuclei?

Several types of white blood cells (eg Neutrophils) have lobed nuclei. Is this for a functional reason? I have seen people refer to structural differences in the lobes as indicative of problems, but ...
2
votes
0answers
35 views

What program was used to create this visualization of a neighbor-joining tree?

I know there are many programs out there to visualize neighbor-joining trees in phylogenetics. I have a tree in Newick format. Does anyone recognize the features of this image as coming from a ...
1
vote
0answers
77 views

is a musk deer's musk pod in its abdomen, its back, or its bottom/rear end?

I have read/heard different things about where a musk deer stores its perfume Some links say it stores it in its abdomen just in front of its penis. Others say the rectum(by which I suppose they ...
0
votes
0answers
25 views

Experiments on effects of RBC in solutions of different tonicity

In hypotonic solution, it appeared to be clearly visible, hemoglobin accumulated at the bottom of tube. For isotonic, it wasn't clear and hemoglobin settled on the bottom. And hypertonic, it appeared ...
4
votes
1answer
258 views

Why is an HIV infection considered “incurable”?

My biology teacher told me that if one caught HIV, they cannot be cured because it was near to impossible to be completely virus-free. She said this was because HIV keeps on changing its glycoprotein ...
7
votes
2answers
212 views

Why do squirrels have twitchy bushy tails?

Whenever I see a squirrel in the woods, it is always the big bushy tail flipping around that gets my attention first. A pray animal with a big bushy flag calling attention to it's self seems to be ...
14
votes
1answer
249 views

How statistically significant was the “sweaty T-shirt” experiment?

An Overview of the Experiment. In 1995 there was an experiment that involves young people smelling T-shirts worn by another gender and rating their preference. The researchers found that people ...
2
votes
0answers
51 views

Why is A-U bond less stable than A-T bond?

I have encountered the following fact many times, but have not yet encountered a possible explanation for it. Will you please help me understand the molecular mechanism by which the bond between ...
31
votes
2answers
4k views

Are there any non-mammalian species known that lactate?

Are there any non-mammalian animals that produce milk to feed their young, or are milk-producing animals always mammals?
1
vote
2answers
77 views

What causes goose bumps?

What is the actual process and reflexes that cause the goose bumps? Why is it an evolutionary advantage to have goose bumps in the first place?

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