0
votes
0answers
2 views

Innervation ratio

Is the innervation ratio the number of muscle fibers/neuron or the number of neurons/muscle fibers? My book doesn't define innervation ratio but mentions ratios: In primates the number of muscle ...
0
votes
0answers
3 views

How to poikilotherms thrive in a wide range of temperatures?

What is it about the metabolism of a poikilotherm that enables them to adapt to the surrounding temperature?
-3
votes
1answer
45 views

Mutations, Death and the theory of Evolution

Evolution always made sense to me and I still find it to be true. However, I quite recently found a comment online that gave me some doubts and made me curious on the subject. Although a student of ...
2
votes
1answer
15 views

How do antibiotics combined with a non-Western diet affect weight loss?

Wikipedia describes a Western diet as: ... higher intakes of red and processed meat, butter, high-fat dairy products, eggs, refined grains, white potatoes, french fries, and high-sugar drinks. ...
5
votes
1answer
93 views

What is this spider, and what is this object that emerged from its rear end?

I was observing this spider (caught in a Petri dish) under my microscope, when I noticed that a small, round object emerged from its rear end. It appeared to be black and white in appearance. I am ...
3
votes
1answer
16 views

What is this wasp killing insect?

I spotted these two in my garden. What is this insect? He had firm control over the wasp and was just hanging on by one leg. He appeared to hold on until the wasp stopped moving and then flew away ...
0
votes
1answer
21 views

Why aren't all animals cold blooded?

At least, why don't all animals produce no more heat than the tiny amount that's a byproduct of walking or a bonobo climbing up a vine when the outside temperature is above 0°C? They won't freeze ...
4
votes
1answer
119 views
+50

Why does human chromosome 19 have the second highest number of protein-coding genes?

While chromosome 19 only is the 19th largest autosomal chromosome, it contains 1440 protein-coding genes, and thus has the second highest number of protein-coding genes of any human chromosome. For ...
6
votes
3answers
34 views

ID flying insect found in Belgium

I live in Belgium, and I've just witnessed a weird looking wasp/fly flying around in my room. Here's a picture: So, what's this? It's still in my room, just chilling there. It zooms like a wasp, ...
23
votes
2answers
2k views

Why is rabies incurable?

I'm still not sure about the mechanics that lead to rabies being incurable. I know that it can be treated before any symptoms show up, but why is it that once symptoms show the person is a dead man ...
14
votes
1answer
20k views

What is the composition of human feces?

Are there any studies or general information on the composition of human feces? I'd specifically like to know the percentage of carbohydrates and amino acids relative to the amount that was ingested ...
0
votes
0answers
6 views

One blue and one brown eye. What's up with that?

I am studying Mendelian genetics -> Punett Square , but no match is there for below: One of my best friends in elementary school had one blue and one brown eye. What's up with that?
1
vote
1answer
29 views

Name of this flower?

i'd like to know the name of this flower.
1
vote
0answers
8 views

Is it possible that one day people will all have the same eye color and skin color?

I was studying Mendelian Genetics and I get this doubt . Is it possible that one day people will all have the same eye color and skin color ?
-3
votes
0answers
30 views

Selectivity of anti-bacterial affect of oxygen

As far as I know the oxygen is a natural, powerful cleanser which cleanse the body of bacteria, viruses, and toxins, so in other words it's killing bacteria, pathogens, viruses and toxins naturally. ...
0
votes
0answers
11 views

Simple test data for learning local sequence alignment

I would like to obtain some published sequences for learning local sequence alignment. Where could I obtain a set of published sequences (of e.g. dropsophila) and some shorter sequence (which I would ...
4
votes
2answers
37 views

Identification of an insect from Florida

Any entomologists or there that can identify this bug? I live in north Florida, found this guy in my bedroom and thought it was a bedbug but I think it was too big, about half an inch long.
0
votes
0answers
8 views

X-linked Traits in Males and Their Effect

Let's say you're a male and you're hemizygous for an x-linked recessive trait (i.e. Haemophilia), will you express that trait? A question from my textbook can be paraphrased as follows, Tom and ...
2
votes
1answer
40 views

What might this animal be?

I have found two species of this strange looking animal on the Eastern shore of the Adriatic Sea and I was simply unable to recognise them.
3
votes
1answer
32 views

What is this tiny insect?

I took this picture in central Mexico. The insect is about 1mm in size. I found lots of these dead on a desk, so many that at first I thought they were just dust. I assume they came from a plant that ...
0
votes
0answers
13 views

Why do halophytes have pneumatophores?

The following is a excerpt from Studies in Botany The problem of respiration is a matter of difficulty in the soil which is saline, water logged and rich in putrefying organic bodies-hence poor in ...
-2
votes
0answers
8 views

What would happen if molluscs didn't have shells?

If a mollusc lost its shell for some reason, what would happen The mollusc must of had the shell before it got lost, so ones that didn't have shells to begin with don't count
0
votes
0answers
5 views

Do molluscs shells regenerate?

Does a molluscs, for example mussels, shell grow back? Because it will obviously be degraded with time, what with ocean acidification and such. But can the organism grow the shell back? If so, how ...
7
votes
2answers
91 views

How do neurons find each other?

Neurons form complicated networks in brains, but their connections can't be random (at least not entirely). Brains function similarly among all members of individual species, and that functionality is ...
1
vote
1answer
101 views

Missing 4 $\ce{H_2O}$ (per glucose) in Cellular Respiration… Where can they be?

I having trouble understanding the equation of the cellular respiration. The thing that bothers me is the number of $\ce{H_2O}$ molecules. Generally, cellular respiration is written thus : $\ce{C_6H_{...
1
vote
0answers
15 views

Effect of pH on stability of ATP

ATP hydrolizes to ADP and phosphate in a strongly exergonic reaction and is used for energy transfer and short-term storage in cells. ATP is stable inside a cell, so a significant activation energy ...
1
vote
0answers
5 views

How does having an empty stomach affect absorption of compounds?

From personal experience, compounds such as nicotine, caffeine and alchohol appear to absorb much quicker into the blood on an 'empty' stomach', or after extended periods of fasting. If this is the ...
2
votes
0answers
22 views

Is this some sort of fungus?

There is something strange growing straight out of the glass windows at work. They look like hairs, about half an inch long, and each have a white spot on the tip of them, slightly weighing them down. ...
1
vote
0answers
20 views

Do users of CRISPR/Cas iterate or parallelize to try multiple guide sequences?

I've read about on-target efficiency and off-target effects in use of CRISPR/Cas9, and about tools that suggest good guide sequences. I am wondering: how many guide sequences do typical CRISPR users ...
1
vote
1answer
119 views

How much do crocodiles eat?

How much do crocodiles eat? The closest I found to an answer was on German wikipedia, where it says that adult nile crocodiles eat "only about 50 full meals a year." While interesting, without knowing ...
-2
votes
0answers
18 views

What are the differences between good (pathogens) and bad (beneficial) bacteria? [on hold]

What are the main differences between pathogens and beneficial bacteria? Is it the only difference that one create a poisonous waste material and other not, or there is something else?
3
votes
1answer
594 views

Storing Taqman plates with polymerase in fridge before running

I'm going to be running some Taqman assays on cDNA generated from RNA collected from various samples, and will end up running a bunch of plates (right now the setup is 1/2 a plate per sample, ...
-1
votes
0answers
11 views

Why can Neural Stem Cells be attracted to specific sites in the brain?

Neural Stem Cells (NSCs) have recently attracted attention as an innovative way of the cell therapy. NSCs have a highly migratory capacity and are attracted to the site of a brain pathology. Because ...
0
votes
0answers
4 views

Switching of life cycle Lambda phage

Hello everyone iam very curious to know how the lambda phage switch their life cycle (lysogenic and lytic cycle). I want to know the detailed mechanism by which this switching occurs in the phage.
0
votes
0answers
12 views

Loss of HBV Immunity

I had a full course (three doses) of Engerix-B in 2011 and 2012, but recent blood tests show my anti-HBV antibody titre is very low, so I just had a booster dose. This isn't the first time something ...
0
votes
0answers
16 views

Function of the centriole

My bio text book says Centriole is like the Nucleus of Centrosome What does this mean ? I'm a bit confused.
1
vote
0answers
9 views

Haploview command line: how to get tagSNP

I am trying to use Haploview command line software to compute haplotypes and extract tagSNP for those. When I use the standalone version on my local computer I tick the 'Show tags in blocks' option so ...
0
votes
1answer
55 views

What did young pre-mammals eat before milk evolved? [on hold]

Mammals tend to be born helpless and teeth-less (and in some cases, blind). So for the first periods of their lifetime, they drink milk. Before this milk-producing property was evolved, what did the ...
0
votes
1answer
26 views

Mitochodria's Role For Neuron Regrowth

Recently an interesting study has reported. Zhou et al., 2016. J. Cell Biol. http://dx.doi.org/10...3/jcb.201605101 According to this study, enhancing anterograde axon transport of mitochondria is ...
0
votes
0answers
24 views

generating grid around the protein

I am trying to generate a grid around my protein. Can you please help me with thatn ? I read your post saying it is possible to do that using PyRosetta. Can you please help me with that , how to do it ...
1
vote
1answer
47 views

Why do people sing?

I was wondering the why people sing, but from a biological point of view. Is it necessary for our body? If it is so, then why can't everyone sing well? Is it in direct relation with neurotransmitter ...
0
votes
1answer
30 views

What is the best way to analyze non-quantitative mass spec hits from an immunoprecipitation pull down?

I am studying a nuclear protein and want to come up with a list of potential proteins that it interacts with. From the nuclear fraction of 293T cells, I did an IP (immunoprecipitation) to pull down my ...
1
vote
1answer
31 views

What is the reason for 'microcytic' anaemia?

I know the causes for microcytic anaemia are Fe deficiency, prolonged inflammation, Thalessemia, Sideroblastic etc. All these logically point to a decrease in Haemoglobin synthesis - either Haeme or ...
4
votes
1answer
20 views

Why does the cloned cat, CC, exhibit mosaic fur color?

Since fur color in this cat is from a sex-dependent gene, I see how calico cats occur. However, I don't fully understand why it happens in cloned cats. When the cat is cloned, the DNA is taken from a ...
3
votes
1answer
23 views

How specific are CRISPR-cas9 cuts?

CRISPR-cas9 uses a string of RNA that matches with DNA and makes a double stranded cut at that point. If the RNA is just a few letters in length, the enzyme would cut DNA in many places. It would be ...
3
votes
1answer
51 views

How are some people able to continue growing after reaching maturity?

This is technically a cross-post of a question posted last year concerning gigantism and how certain people are able to grow far past expectations after it's assumed they've reached maturity. How are ...
1
vote
2answers
77 views

Correlation of non-coding DNA with coding DNA

I sequenced the first exon of the MC1R gene of 15 labradors (genomic DNA) to look for the loss-of-function mutation (C.916C>T) and as expected, it was where it should have been (916th base pair). As i ...
3
votes
0answers
22 views

Venom Denaturing with Heat

My friend got stung by a stingray yesterday and the lifeguard quickly stuck her foot into hot water (she said the water burned slightly on contact) and remarkably, she was walking without pain in a ...
1
vote
0answers
16 views

How do the chemical components of these spices prevent fungal growth?

I am doing an EE on how spices affect fungal growth for the following spices - oregano, garlic, cinnamon, cumin and turmeric. Its been hard to find any sites that say why or how they affect fungal ...
0
votes
0answers
15 views

What's the best way of generating high yields of mitochondrial DNA

I want to extract mitochondrial DNA from a fungus, but there are two ways to cultivate the fungus, one is to cultivate it on an agar medium (covering a piece of cellophane paper to stop hyphae to grow ...

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