3
votes
0answers
17 views

Do butterflies pass over migration patterns to their offspring?

So, earlier, I read online (http://io9.com/butterflies-remember-a-mountain-that-hasnt-existed-for-509321799) that Monarch butterflies veer east during their southward migration to avoid a mountain ...
0
votes
0answers
5 views

Why are cats more afraid of mild thunder than other louder sounds?

To repeat the title: Why are cats more afraid of mild thunder than other louder sounds? I have observed this behavior with my cats and with cats of others, which made me wonder if this is a ...
2
votes
0answers
28 views

What is basis of centralization of “master glands” in the endocrine system?

I have just started reading about the endocrine system and I am having some difficulty understanding the basis of distribution of glands and associated hormones. I am using centralized to describe ...
1
vote
1answer
29 views

Design arbitrary degenerate primers (with non-binding criteria)

I would like to design a number of arbitrary degenerate primers (primers with variable bases, e.g. NGATWGCTSATNGC) for a TAIL-PCR. I would like to be able to ...
0
votes
0answers
18 views

Cut-off values for LD, LOD and D-prime as algorithmic input

I created an algorithm to generate SNPs for random people of different descents - based on HapMap data. While this works good, there is something else I want to take into consideration. So if a SNP ...
0
votes
0answers
24 views

Efficient algorithm to calculate various population divergence statistics

Intro and description of the data I am simulating the evolution of very long DNA sequences. The model works well, is performant and will output data in the following kind of fasta format ...
2
votes
1answer
26 views

Application of Latin names for Taxonomy

The current taxonomy has family names like Canidae and Felidae. But Felidae has sub families like Felinae and Pantherinae. Roaring cats and non-roaring cats. My question is based on the fact that we ...
0
votes
1answer
43 views

At what saltiness will water simply pass through us?

If water has a low salt content, it hydrates us. When water has too high salt concentration, like sea water, it drains water out of us instead when we drink it. At what salt concentration would water ...
4
votes
1answer
34 views

Did any dinosaur molt?

Like snakes or lizards, did any dinosaur molt ? if yes, have we any proof of it ?
4
votes
0answers
13 views

How does chromosome fusion get fixed in the population?

It's well known that one of human chromosomes is the result of fusion between two chromosomes in a primate ancestor. If we put anthropocentrism aside, it becomes clear that fusion events happened a ...
3
votes
0answers
7 views

Spatial learning in microorganisms

Has there ever been an experiment performed that demonstrated a form of 'spatial memory' in a unicellular organism? I'm imagining something analogous to the classic 'rat in maze' experiments, but ...
0
votes
2answers
42 views

Which ORF will be translated

I've a question about ORF and translation into protein. Say I have an RNA transcript that contains two ORFs, one in phase 1 ; one in phase2 ; as: ORF number 1 in reading frame 1 on the direct ...
6
votes
1answer
32 views

What is the biochemical explanation for tingling and burning sensation in the brain?

Consumption of mustard (spicy English Mustard), wasabi and horseradish based food dressings usually result in a burning, tingling or freezing sensation in the brain/scalp and nostrils as the vapour ...
2
votes
2answers
60 views

How do researchers map root systems of plants?

For example, here is a picture of the root systems for some prairie grasses: (Click image for higher-resolution PDF) from: http://www.conservationresearchinstitute.org/educational-offerings.html How ...
0
votes
0answers
17 views

How to measure the biomass of hydroponic plants in netpot/rockwool DWC system?

I'm doing an experiment with 4 kale plants, each in their own small DWC system. Each plant was transplanted in rockwool with netpots and clay pebbles. But I need to periodically and accurately measure ...
3
votes
0answers
36 views

How many animal species are larger than humans? [on hold]

I sometimes think about just how huge humans are in comparison to most animals. Even compared to a squirrel, which is really a pretty large organism in the grand scheme of things, humans are hulking ...
11
votes
3answers
2k views

What is happening when we get a tan?

Almost everyone nowadays wants that nice summer tan, but what exactly is going on beneath the skin? I've heard a few different theories about tanning - such as a tan is nothing but the pigmentation in ...
7
votes
2answers
1k views

Is this a crayfish hole? or wasp nest?

I'm suspicious that it might be crayfish, which I'd think was insane (I still kind of do), if I hadn't found a dead one around my house earlier this summer. Is that definitely what it is, or do I ...
-2
votes
2answers
37 views

Transfer by Ingestion [on hold]

Does our body absorb GM dna or Natural dna or dna of someone else's human blood(not relatives) taken with food so big that it has genes?
1
vote
2answers
38 views

Evolution of insects, spiders and jellyfish

Well we all learned at school the classic evolutionarily theory ...
3
votes
2answers
68 views

Why can we use mouse-produced antibodies on mice tissues?

I have seen biologists use mouse grown primary antibodies in mouse tissue, and they've told me that if the blood is perfused well then there is no problem with this method. How does the secondary ...
2
votes
0answers
11 views

Which hydrophobicity scales are best for detecting transmembrane regions, and why?

There are many hydrophobicity scales for protein analysis. Broadly, I gather the differences between them are from the experimental method to acquire the data and the normalisation (or lack thereof) ...
2
votes
1answer
94 views

Why do some people burn and others tan?

Connected to What is happening when we get a tan? - Why do some people burn while other people tan? Very pale people tend to just burn while other people tan very nicely, what causes this difference? ...
0
votes
0answers
34 views

What biology should be known by a newly married couple? [on hold]

What is the minimum useful biology that a couple entering married life must know? I guess the knowledge must pertain to a basic understanding of the nature of reproductive system and use of ...
9
votes
2answers
749 views

Linear and Circular DNA

So school has taught us that eukaryotes have DNA that is linear and inside of a membrane - called the nucleus. And that prokaryotes have circular DNA that is free floating inside of the cell. We ...
2
votes
1answer
32 views

Choosing the best assay for my experiment?

Which of the following assays can be used to determine whether cell death specifically due to apoptosis has occurred in a given cell sample? Choose all that apply. 1) WST-1 Assay 2) Caspase ...
7
votes
2answers
1k views

Why should plants transform glucose into sucrose before transporting it to other parts?

I've learned that plants transform glucose into sucrose before sending it into phloem. But the process seems to be complex and energy comsuming. Why should plants do it? Is it really necessary?
1
vote
1answer
49 views

Why does my anti-ubiquitin antibody visualization not work on my PAGE gel?

I am using 2D gel electrophoresis to visualize polyubiquitinated proteins. However, while I can see actin and heat shock protein using when appropriate antibodies, I cannot visualize them using ...
0
votes
0answers
8 views

What is the concentration of leptin in white adipose tissue in mice? [on hold]

I am trying to perform an ELISA experiment and for this I need to know the physiological concentration of the hormone leptin in white adipose tissue in mice.
3
votes
1answer
151 views

Beetle with long, slender iridescent green body and orange legs

I recently saw this beetle while on a trip in central Texas, USA (in a rural area just before sundown). The body was about 2-3 inches long (compare to nearby chair leg and floorboards) and had a long ...
1
vote
2answers
116 views

What is a substance that is safe to eat, not absorbed and not metabolized?

I would like to know whether there are substances that are safe for humans to consume, are not absorbed and do not interact with any digestive process. So, food is disqualified because although it ...
1
vote
1answer
50 views

What concentration of table salt is needed to kill bacteria in sweaty gym clothes?

My gym clothes retain an unpleasant musk even after washing them with warm water and detergent. I've experimented with soaking my gym clothes in salty water before washing them. My hypothesis is that ...
5
votes
1answer
59 views

What is the scientific name of this evergreen plant?

This plant is found in India. It is an evergreen plant. Would love to know the scientific name.
8
votes
0answers
96 views

Biopython - Big Discrepancy Calculating RNA melting Temperature over Literature

I experience big discrepancies when calculating melting temperature of RNA 7-mers with Biopython over values generated by a popular algorithm. I tried the nearest neighbour algorithm with RNA and ...
8
votes
5answers
248 views

Theoretically, is domestication of (virtually) any animal possible?

Looking at ones that manage well alongside us human animals, such as dogs and cats, we see that this is possible for evolved, distant animals to have heritable, preferable traits around people. ...
9
votes
1answer
170 views

Do invasive species cause long-term damage to ecosystems they invade?

Growing up in the U.S., I was warned at various times of the dire consequences of a variety of introduced pests (usually insects). Japanese beetles, gypsy moths, and most recently the brown ...
2
votes
4answers
120 views

Can connections between neurons be weakened?

Connections between neurons are said (by Wikipedia) to be strengthened as part of learning - can they also be weakened (below the original level)? I understand the concept of the connections ...
2
votes
0answers
65 views

What is the name of this bird?

Does anyone know the name of the bird in the pictures? It was found in the south of Spain in the month of June. (it is certainly neither a house sparrow nor a swallow nor a robin). Thanks for the ...
2
votes
0answers
23 views

Is perceived time compressed or expanded while dreaming? (or does it match reality) [on hold]

I often dream long extended dreams. Sometimes I wonder if the timeline of the story of my dream occurs compressed, in a moment, or other times extended slowly over a long duration. Is there any way ...
6
votes
1answer
106 views

Why does the human brain not overfit when training at some task?

One of the problems that occur during (artificial) neural network training is called overfitting. The error on the training set is driven to a very small value, but when new data is presented to ...
7
votes
1answer
97 views

What is the mechanism behind tinnitus?

I seem to have come across two contrasting explanations for tinnitus induced by loud noises- i.e. damage to the hair cells in the cochlea. On the one hand, I have read that damage to the hair cells ...
-2
votes
0answers
39 views

Buccal vaccine for viral infection of MALT

What would be the effect of a daily (repeated for several months) buccal or sublingual vaccine in the form of a deactivated virus - say HSV1 - to a person already infected with it? Whilst also ...
2
votes
1answer
39 views

(How) Does the human digestive system process petroleum jelly, aka petrolatum?

Does the human digestive system processes petroleum jelly? In other words, does it pass through the digestive system without any interaction, or is it absorbed and/or metabolized?
6
votes
1answer
255 views

How bad is ethidium bromide in your plasmid for downstream applications?

I want to transfect Adipose Derived stem cells using a clone of my own. My problem is that I get a lot of contamination (not only genomic, but due to the nature of the technique, I get undesired ...
17
votes
3answers
997 views

Why does the face turn pale in dangerous situations?

I know what the effects are of a dangerous situation on the brain, i.e., an activation of the hypothalamic-pituitary-adrenal (HPA) axis which eventually results in an increased heart rate and elevated ...
-2
votes
0answers
23 views

Plankton growth as a function of temperature [on hold]

I have a data set like folow Time-Temperature(0C)-Species_1(individuals) 01-T1-S1 02-T2-S2 n-Tn-Sn Now I want to caculate growth of species_1 as a fuction of temperature. How I can do that from the ...
21
votes
1answer
3k views

What is it that creates that wonderful smell after a fresh rain?

I've heard that the wonderful smell of a fresh rain is actually chemicals released from the trees and grass and other plants. What is the process that allows these chemicals to be released? What ...
4
votes
2answers
368 views

Why doesn't human consumption of plants cause infectious diseases the way consumption of animals can?

At first I want to clarify that I do know that there are naturally poisonous plants and plants that can hold radioactive stuff or toxic material from the environment. What I mean by "diseases" (I ...
3
votes
1answer
111 views

Enzyme Assay - pectinase

During assaying an enzyme at high temperature, the substrate (Pectin) is degraded by the high temperature rather than by enzyme, so, how can I minimize degradation of the substrate by the temperature? ...
0
votes
2answers
94 views

Why a striped baby is not the result of a white and a black parent? [on hold]

Someone asked me: If a striped cat is the result of a white and a black cat, why the result of a white woman and a black man is not a striped child? I know the answer. I also know that the ...

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