5
votes
1answer
83 views

Lost Ability to Regenerate Body Parts during the Transition from Amphibians to Mammals

Why have higher-order animals lost the ability to regenerate body parts during evolution? Wouldn't it be better for survival? What is the evolutionary theory behind it?
1
vote
1answer
42 views

RNeasy Mini Kit low 260/230 ratio — can I purify this RNA for further use?

I used Qiagen's RNeasy Mini Kit to isolate RNA from 5*10^5 C28/I2 (immortalized human chondrocytes). However, my yield is low (~25 ng/ul), but my 260/280 ratio is great (~2.3), and my 260/230 ratio is ...
3
votes
0answers
19 views

To measure Na/K channel activation in membrane level?

Assume that there are two different signals going on in the ECG - during depolarisation and repolarisation in the standard ECG. I got an advice that do not use the standard ECG in measuring exactly ...
2
votes
0answers
36 views

Inductance in cell

In an animal cell, especially neuron and in particular its axon, while there is electrical resistance and capacitance mechanism in the cell, which play essential roles in the cable theory model of ...
2
votes
1answer
31 views

What is the role of lamellar bodies in lung cells?

Lamellar bodies have been found to be secreted in lung cells many of their associated proteins have been identified. What is the current consensus or research on the function that these lamellar ...
0
votes
2answers
79 views

How can you explain the origin of life out of nonliving matter (abiogenesis)? [closed]

According to biochemist Robert Shapiro, the "primordial soup" theory is as follows: Early Earth had a chemically reducing atmosphere. This atmosphere, exposed to energy in various forms, produced ...
0
votes
2answers
36 views

Is there any possible way that hybrids can mate?

I'm writing a book, and a a portion of it involves a society of humanzees. Now, is there any plausible way that a hybrid (such as a humanzee) could procreate either with one another, or with their ...
1
vote
0answers
34 views

What is the word to describe a symptom that when people did something, they tend to do it again without noticing about it? [closed]

I'm looking for a symptom, a word, if existed, to describe that when people do something, even one time only, they tend to do it again, with or without even notice they are doing it. P/S: Something ...
2
votes
1answer
40 views

When a thought 'crosses your mind', does it literally cross between left and right cerebral hemispheres?

I've heard that part of cognitive processing is information passing between left and right cerebral hemispheres. This is what happens in the Cerebral Cortex which is divided into two hemispheres, ...
4
votes
1answer
59 views

Effect of steroid hormone on specific cells?

As steroid hormones can pass through the plasma membrane by simple diffusion because they are lipid derived hormones, it means that they are capable of passing through every cell of our body, BUT why ...
2
votes
2answers
53 views

Is there a durable surface that ants can't pass?

I'm looking for a surface, that will be impassable for ant's yet not poisonous or easily decaying. One idea is water - they really can't cross that. But water easily dries and is quite uncomfortable. ...
4
votes
1answer
28 views

Can you measure ECG from a single location?

I want to make a DIY bracelet to measure my ECG. All I need is the interbeat interval. Can I design a bracelet on one arm only, with two electrodes slightly spaced from one another, and figure out ...
7
votes
1answer
124 views

How did these apples grow together?

I came through this pic while scrolling through facebook, and it was a bit strange to me. As far as I know apples have a corymbose type of inflorescence, in which a single pedicel ends in a single ...
0
votes
1answer
37 views

What is this discarded exoskeleton from?

This morning I was looking round the garden and found this sticking out of a pit in patch of soil, next to the wall of the house (in a trough sort of thing). I came to the conclusion it must be part ...
3
votes
0answers
43 views

Intuitive explanation for Kin- and Group- selection

It is known from theoretician in the field of kin selection that kin selection (inclusive fitness theory) and group selection are actually two sides of the same coin. In other words, these two ...
2
votes
1answer
46 views

Mesoporous silica particles as anti cancer drug delivery method

If this question is a little off topic for Biology, I'm sorry. I've recently read a lot about mesoporous silica nanoparticles as a promising drug delivery method. The huge range of customizability of ...
2
votes
1answer
238 views

How is this yellow bumblebee called that I photographed in New York City?

Does anybody know the name of this bumblebee? (For categorization on wikipedia commons)
3
votes
1answer
495 views

What is the name of this flower with purple leaves and orange inner part in NYC?

I've photographed this flower a few days ago in New York City: Does anybody know the name of it? (and how is the orange part called?)
2
votes
0answers
30 views

Will breathing through mouth result in any disorders? [closed]

My nose is slightly bent. When I was born, I had an issue with breathing. My mom said that doctors had inserted a breathing tube in one of my nostrils. This tube may have caused the deformation. From ...
1
vote
1answer
41 views

How Ants know about Earthquake?

How does an ant know about Earthquake is it because of an organ or due to other factors?
2
votes
1answer
33 views

Do Ants have a sense of Direction?

Do ants understand which way is up or down? Could they differentiate between uphill and downhill?
3
votes
0answers
26 views

DNA barcoding, querry regarding tree based (cluster) methods for species identification

I am working on success rate of DNA barcoding in identification of species using distance and tree based methods. Regarding distance based method, I have used Adhoc and species identifier and ...
5
votes
1answer
31 views

Braquio-abduction illusion explanation and references

Illusion: Lying down on a hard flat floor move arms up and down (as when doing a snow angel) while keeping them touching the floor. While repeating it a few times the floor begins to appear concave, ...
2
votes
0answers
15 views

what would be the total number of pleura in the exoskeleton of cockroach

basically as far as i know cockroach consists of 10 terga and 9 sterna but what are the total number of pleura present in the cockroach pleura are situated between tergum and sternum of a body ...
2
votes
1answer
42 views

Remove RNAse from pipettes?

Our lab uses old Gilson Pipetman pipettes. I've been using some for making mRNA by in vitro transcription and started running into RNAse issues. I'm trying to clean everything up, including the ...
1
vote
2answers
43 views

What is the formal terminology for two species that are “close” to each other in a phylogenetic tree?

Take for example the human and the chimpanzee, they are "closely related" species since they are "close" to each other in a phylogenetic tree. However, this terminology seems pretty informal, what ...
4
votes
1answer
78 views

Question about Monofunctional glycosylases

I am learning about Base excision repair mechanism. I understand the main idea how glycosylases are working, but I am trying to understand this with much more details. I found a paper where they are ...
2
votes
2answers
64 views

Turning publicly available genome data into proteins

I'm a computer scientist who is starting to dabble with biology. My eventual goal is to model different kinds of cells with a computer program. As of right now, I'm just trying to take some smaller ...
7
votes
2answers
490 views

Which phylum appeared most recently

I'm aware that our earliest records of many major animal and plant phyla come from the Cambrian or Precambrian periods, and I'm also vaguely aware of some of the objections raised with general concept ...
5
votes
1answer
64 views

How does someone with red-green colorblindness see yellow on a monitor/television?

I recently watched the video This Is Not Yellow explaining how red, green, and blue pixels can be used to create images of all other colors. Since yellow is created with red and green pixels, how is a ...
0
votes
1answer
43 views

To what extent is it possible to understand if a bacteria can produce a protein? (in silico only!)

I have to answer a question about a sub-task of my thesis: Can the bacteria X produce the protein Y? I searched of course Google and BLAST. There is no data supporting that this specific bacteria ...
1
vote
0answers
20 views

Zinc gluconate, proteolysis, and the Zicam debacle

In 2009, the FDA banned Zicam's zinc gluconate nasal gel after several hundred users suffered prolonged or permanent damage to their sense of smell. The company tried to claim it was coincidence, but ...
0
votes
0answers
18 views

coevolution by physical interaction between RNA sequences

There are several items that relate to the concerted evolution between pairs of sencuencias (especially structural) rRNA as a consequence of physical interaction in tertiary, or even quaternary ...
1
vote
0answers
17 views

detection of primary origin (natural selection or genetic drift) on alterations in sequences

I recently had a question about how to distinguish the origin of variations in the sequences of rRNA as to whether alterations are generated by genetic drift or natural selection. For me it has not ...
1
vote
2answers
47 views

How to know if your breathing is normal?

Is it possible for a device to measure how much air we breathe in and out over the entire day and at what rate? I think if we have access to this data we can compare it across people.
3
votes
1answer
49 views

How to recognize a conserved motifs of the protein

I would like ensure that my reasoning is correct. Assuming that I know the aminoacids sequence of the protein of interest. I can't say anything about the structure looking only at the aminoacids ...
7
votes
1answer
408 views

Perspiration after drinking water

If we don't drink water for a long period of time(say,10 hours), as during fasting and then when we break our fast by drinking water why is it that our body starts sweating?
7
votes
1answer
77 views

Do ants feel acceleration?

The organ we have to provide us with current acceleration information is quite complicated. Because an ant queen didn't seem to notice when I picked up the bottle she was in, I have a suspicion that ...
3
votes
1answer
28 views

Regarding apoptosis and inhibitors

If there is an apoptosis shut-off mechanism of any kind, one could call it a null-apoptosis mechanism. If this is possible, could there be a null-apoptosis inhibitor? Something that inhibits an ...
2
votes
1answer
25 views

Regarding signalling pathways

Do all signalling pathways have something that can inhibit them? If the signal pathway is benefitial and it is inhibited would the inhibitor be caused by a biological problem? Are all inhibitors ...
0
votes
0answers
17 views

Book recommendation on mammal (or just primate) behaviour, especially in relation to child-rearing

I have a growing frustration with the lows 'new-age' parenting is reaching, along with asininity of so much of our public schools' (and summer camps') philosophies and policies in relation to our ...
2
votes
1answer
46 views

Is it dangerous to eat a mutated eggplant descended from a radioactive ancestor?

What is the risk, if any, associated with eating a 100th-generation mutated eggplant derived from a radioactive ancestor? In another word, is that possible that organic toxin will be produced by the ...
1
vote
2answers
50 views

Is there a correlation between total neurons and intelligence?

Thanks for looking. First off, I am not a biologist, just a curious layman, so I apologize in advance if this isn't a "good" question. Please don't downvote me into oblivion. I read today that the ...
9
votes
2answers
568 views

What happens once a brain is full?

I just read the answer to this question, and it got me thinking... If the human brain (or any other brain) has a finite amount of storage, what would happen once the brain has taken in its maximum ...
1
vote
0answers
31 views

Common linnet baby bird - when does it become completely self-sufficient? [closed]

Basic info: found a baby bird already fledged. It is a common linnet. It was found on the ground with no means to hide. It was unable to fly up, so based on information from some literature it was ...
3
votes
1answer
261 views

Is there any size limit to the amount of information a human (or other) brain can hold

Im not sure how this would ever be tested but is there a limit to how much the brain can 'hold' before it reaches capacity ? I guess this could also be interpreted in terms of memory, as how well ...
3
votes
1answer
63 views

What is the name of this plant?

This plant was found growing in Germany. I have never seen it before, reverse Google image search did not help either. Can you help me identify what type of plant this is? Thanks, looks like it ...
3
votes
1answer
60 views

why are neutral [sterile] female flowers present in inflorescences when they are reproductively incompatible

in many compound and special inflorescences like spadix and hypanthodium there are sterile female flowers along with male and female fertile flowers and are often present in between male and female ...
3
votes
1answer
72 views

How big can cold-blooded animals get?

It seems impossible to have reptiles the size of dinosaurs, just because they are really big! Did they have different systems of maintaining body temperature or maybe they weren't the exact type of ...
2
votes
1answer
22 views

Currency metabolites vs. current metabolites: What's the right term?

I have seen the two terms currency metabolite and current metabolite used interchangeably. Is there a consensus on which is the ...

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