0
votes
0answers
2 views

how to identify the age of a living person?

Different people may age differently. A 60 year old man may appear to be a 80 year old man, while somebody else could be younger than their apparent appearance. And some other people may have ...
-1
votes
0answers
12 views

A device that could change the sound of your voice

Okay so basically the concept the device works on is that our accents and our individual unique voices come from the vibration of our cartilaginous tissues.So everybody's voice is determined by the ...
-1
votes
0answers
9 views

Did cavemen have straight teeth?

In today's world, having straight teeth is considered attractive. But there are so many people who need to wear braces to achieve this look. Is having straight teeth naturally attractive, or is it ...
-1
votes
0answers
17 views

List of questions answered by evolution

I have searched the internet for a list of questions answered by evolution, and have found only small lists and lists of why evolution in false. Evolution provides solutions for why all living beings ...
0
votes
1answer
29 views

How did evolution support sports, fun, entertainment etc [duplicate]

We know that many animals entertain themselves by playing games. But sports actually increases risks of death,or at least accidents. So why did evolution choose it? And why did evolution decide to ...
2
votes
0answers
18 views

Spider Identification Michigan

This was taken in Ann Arbor, MI. It looks a bit different from the wolf and grass spiders I'm used to seeing. Anyone know what this might be? edit: Per request, I've uploaded a better picture. ...
0
votes
1answer
7 views

Is there a good analogy that illustrates the difference between early DNA sequencing techniques and shotgun sequencing?

My first university biology classes begin in September. In preparation, but increasingly out of curiosity, I've been studying some basic biology. Saying that to say, I know as much about DNA ...
14
votes
4answers
1k views

Why would a plant evolve to produce an addictive chemical?

It seems kind of anti-productive in terms of survival for a plant to produce an addictive chemical as that plant will constantly be sought after by animals that ingest it. I'm looking for a possible ...
-2
votes
0answers
6 views

Cell division(function of histones in division) [on hold]

What is the function of histones in cell division such as in mitosis or meiosis?and what does the characteristic of the protein?
3
votes
0answers
21 views

What Chemical Trigger Causes Ectomycorrhiza To Change From Asexual To Sexual?

I am searching for the catalyst behind the change of asexual to sexual ectomycorrhiza when symbiosis with a tree root is formed. As ectomycorrhiza attaches itself to a root, they form a relationship ...
0
votes
1answer
13 views

Chimeric Gene vs Fusion Gene?

According to wikipedia on chimeric genes: These mutations are distinct from fusion genes which merge whole gene sequences into a single reading frame and often retain their original functions. ...
0
votes
1answer
22 views

Finding a reaction from a KEGG map

I have come across a map and a part of it looks like this: Now I have not been able to locate the reaction that converts alpha D-Glucose to Glucono-1,5-lactone but was successfully able to locate ...
0
votes
0answers
39 views

How can an autopsy return an inconclusive result? [on hold]

This may be a rather foolish/naive question, but I am confused as to how an autopsy can ever return an inconclusive result as to the cause of somebody's death? It does not seem uncommon for the ...
0
votes
1answer
53 views

Biologically, does life and death matter? [on hold]

(Sorry that I'm on mobile, so I can't make a good formated question (no links). I will add them later. Just can't resist the urge to ask) In the recent hot question about whether mitochondrial is ...
4
votes
1answer
57 views

Current understanding of abiogenesis

I am trying to understand the current work on abiogenesis in biology, e.g. primordial soup, the Miller-Urey experiment, etc. How has our understanding of abiogenesis been revised since the ...
-1
votes
0answers
28 views

high throughput free software to predict blood-brain barrier permeability [on hold]

I need a desktop app to predict blood-brain barrier (BBB) permeability of a few thousand compounds. I've searched for hours but didn't find a free software for that. All of the apps are either ...
2
votes
1answer
42 views

What is the strand specificity of a reference genome?

It's a simple question but I've come across many people who have this question, is the reference genome Positive of Negative strand? Indeed, I've had heated arguments over the same issue. So here's ...
1
vote
1answer
21 views

Gene and Protein isoform

What is the relationship between term "Gene isoform" and "Protein isoform"? Say a gene can make 3 isoforms, will it produce only (maximum) 3 isoform protein?
4
votes
1answer
121 views

Lack of A/B-antigen equivalent to Rhesus disease

Rhesus disease occurs when an Rh- mother is exposed to Rh antigens (often due to blood contact with an Rh+ child during delivery) and mounts an immune response which eventually results in the ...
4
votes
1answer
50 views

When did mouth pipetting stop becoming a way to handle liquids in a lab?

Almost all modern lab protocols have an addendum prohibiting pipetting by mouth, instead mandating that a Gilson pipette, a rubber pipette ball, or a serological Pipet-Aid be used. However, it was ...
1
vote
0answers
13 views

Photosynthetic efficiency and light harvesting efficiency

Is there some sort of measure of the light harvesting efficiency (possibly like transfer time) that is directly related to the photosynthetic efficiency in some sort of equation? Also, how important ...
3
votes
2answers
47 views

Evolution of protein and protein efficiency

Suppose we have a bacterial protein that performs a function and let's say we can measure the efficiency of the protein. Let's say we have two species, species A and B, both of which have this ...
-2
votes
0answers
16 views

Information about inactivation of restriction enzyme [on hold]

How can you be sure that a restriction enzyme has been inactivated? I tested restriction enzymes on a vector to see whether they were working or whether they were inactivated but I need a simpler ...
2
votes
1answer
19 views

dAT joining: please define

I came across a reference to dAT joining in my reading of Genentech by Sally Hughes. The technique is described in passing as a technique for joining DNA fragments used around the late sixties to ...
-2
votes
1answer
35 views

Stimulate a nerve [on hold]

My question is that can we stimulate a nerve from far distance? Distances about 5 to 6 cm. Or can we send a stimulation to a nerve from a non neuroal tissue? Edit : excuse me but instead of ...
-1
votes
0answers
18 views

Why do human genes banks exist? [on hold]

What are we collecting human genes for? Do we need them for preservation?
0
votes
2answers
61 views

What are the evidence that all life today descended from a common ancestor (LUCA), and which organisms (if any) challenge the concept?

If I understand correctly, the concept of the LUCA (last universal common ancestor) is based on the hypothesis that archaea and bacteria share common ancestry. In the realm of mathematics, the same ...
2
votes
0answers
32 views

Can HIV mutate to become airborne?

HIV has a very high mutation rate due to its inability to correct errors in DNA replication and it is very adaptable to its environment. Hence I wonder whether is it possible for it to mutate such ...
-2
votes
0answers
27 views

how does the body know it has damage [on hold]

Basically what i am asking is what are the steps that the body takes to monitor its own self for damage ? the mechanics of this monitoring. Some starting points or short resume would be greatly ...
5
votes
1answer
34 views

What is the top speed of muscle contraction?

Currently I am looking into what muscles groups are most used during a football kick. I have a hypothesis that the quadriceps are not as used as most people think because the momentum the swing ...
3
votes
1answer
26 views

What would be the impact of depositing limestone in the oceans (to reverse acidification) on ocean life forms and biodiversity?

This question asked: What is the evidence it is feasible to reverse ocean acidification by adding large quantities of a base (bicarb soda)? The result was: Danny Harvey of the University of ...
5
votes
2answers
63 views

How do animals end up in remote areas?

I was thinking specifically about random marshy water holes on farmers fields. It seems that you can visit just about any one of these and you will find frogs if you look hard enough. They usually ...
4
votes
1answer
88 views

Why are lions the only social cats?

We know that almost all cats are solitary. How did the Lions (Panthera leo) end up social animals? Do we have an explanatory evolutionary path describing how the Lions became social while the rest of ...
1
vote
2answers
26 views

Protein that exit from the cell - as marker

Searching for some protein, that I could use as extracellular marker for mammalian cells. I need to insert mRNA to cell, and to detect the protein outside the cell (not on membrane) if the mRNA ...
-1
votes
0answers
19 views

Do i have Nocturnal lagophthalmos [on hold]

I am a 13 year old girl with a regular everyday life.But lately my mom has been repeatly telling me i sleep with my eyes open and rolling in the back of my head.It has been happening every since i was ...
4
votes
0answers
28 views

Why do crabs spit?

Last year I photographed this juvenile Sally Lightfoot Crab (Grapsus grapsus) 'spitting' (click for larger view): I thought I'd look up more information on this behavior, but couldn't find any ...
-6
votes
0answers
23 views

What is this caterpillar? [on hold]

Found in Colorado but may be from out of the U.S. Can we save it? What kind is it? I can send a picture of it if you email me back.
1
vote
1answer
18 views

What leads to the different types of navels?

Obviously, there are "innies" and "outies" in the human belly button world. Both are the result of a knot tied in the umbilical cord just after birth. But why do some belly buttons become outies ...
16
votes
4answers
5k views

Are mitochondria dead?

In the video "What is Life? Is Death Real?", the subject of mitochondria is raised at 2:58. At 3:12, the narrator says "[mitochondria] are not alive any more: they are dead." What currents of thought ...
0
votes
0answers
12 views

translation rate regulated by transcription factors?

I'd like to know if there is in the litterature some examples of transcription factors capable to impact not just transcription but also translation rate so that both can be adjusted. I would be very ...
4
votes
1answer
38 views

What is the name of this flower?

A flower has grown on a leaf in our garden. What is the name of this flower? Give some description.
1
vote
1answer
32 views

Possible calculations with temperature, humidity, images and VIS spectrum of a plant in an Integrating sphere

I am currently working on a project which involves growing some plants in a integrating sphere made of foam. I have added temperature, humidity and soil moisture sensors as well as a Spectrometer (350 ...
3
votes
1answer
187 views

Have webs woven by LSD-intoxicated spiders ever been studied for their efficiency in fly catching?

I ask, because I have a different interpretation of the experiments performed on web-weaving spiders. The famous Robert Pirsig maintains that LSD is somehow helpful to web-weaving spiders, because it ...
2
votes
1answer
25 views

Is household ammonia okay for plants?

My father-in-law claims that since plants need nitrogen to produce proteins, and since ammonia is NH3, that Ammonia should be fine for the plants, since it's just nitrogen and water and hydrogen, ...
2
votes
0answers
33 views

What happens when a genome is shorter than the other?

Say there were 2 creatures of the same species. Creature 1 has a longer genome than creature 2, it may be just a few base pairs, but what would happen when the genes were crossed to create creature 3 ...
3
votes
1answer
44 views

What is this butterfly?

The following guys (about an inch long) were seen in the Willamette Valley of Oregon in summer. When one would fly by a resting one, they'd get into a high-speed little "dogfight". What genus might ...
3
votes
0answers
71 views

Why do people die? [duplicate]

what is the reason people die naturally even though they have no known disease? I see people become physically weak at times they get old and die eventually in case they are not attacked by any known ...
1
vote
1answer
19 views

Calculation of final magnification when using a CCD camera

I'm trying to empirically calculate the approx final magnification (mag) of digital images rendered through our confocal microscope. Using a micrometer and the microscopy equipment I have, the ...
1
vote
0answers
24 views

Big cat in heat for months?

In this documentary about a lioness and a leopard the leopard is in heat for months. https://www.youtube.com/watch?v=MGqmylkOuKw Usually a big cat would be in heat for 5 days and then not in heat ...
3
votes
1answer
73 views

Will a 0.2g/mL sugar concentration cause vomiting in humans?

This infographic claims that the sugar content in a can of Coca Cola would cause vomiting if not for the phosphoric acid. In The First 10 minutes: 10 teaspoons of sugar hit your system. ...

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