0
votes
0answers
3 views

What are some plants or plant forms with only one cell wall?

I was reading about lignin as material for the secondary cell wall. However, not all plants have this. What are some plants that don't have secondary cell walls? Is it all non-trees such as algae?
0
votes
0answers
4 views

Where to tap into bloodstream to oxygenate blood, least interfering with mobility?

I'm asking this as a sci-fi writer. I'd post this question on Worldbuilding.SE, except it's a site of laymen - and I'd like a professional input, so I'm likely to find better quality answers here. ...
0
votes
0answers
4 views

Neuron connectivity- how are they connected physically

If Neurons are only connected through synapse and there is no physical connection, how are they just suspended in brain layers?
-3
votes
0answers
11 views

Spider creating light

I have noticed a spider creating a green light as it webs. I did take photos of the spider and the light but cannot seem to upload them. What kind of spider does this and how/why?
2
votes
1answer
7 views

Why do humans lose subcutaneous fat tissue with age?

Why exactly do humans lose subcutaneous fat tissue with age? It appears that we either lose fat cell volume or we might actually be losing the number of fat cells with age. One hypothesis is that as ...
0
votes
0answers
3 views

Tensile strength of articular cartilage

The tensile strength of human hyaline cartilage is 5 mpa. The human tibia has an area of 3.25cm2. A 100kg human would put 3mpa of force on this area. The force would multiply when taking a step. ...
1
vote
0answers
13 views

Where does NADP+ come from?

Trying to understand Photosynthesis better. I understand the NADP+ is reduced to NADPH in light dependent reactions and NADPH is then recycled back into NADP+ in the Calvin cycle. What I don't ...
0
votes
0answers
11 views

How accurate is bomb calorimeter for measuring nutritional calories of food?

Burning food seems not be accurate for estimating calories in fiber or alochol, but I'm wondering how well it works for other carbs/proteins/fats. Any pointers to literature are appreciated.
1
vote
0answers
4 views

What Does Transcription Factor E25 Activate When a Cell is Transitioning from G1 to S

Cyclin D/ CDK4 phosphorylates Rb allowing for the activation of transcription factor E25 during the G1 phase of the cell cycle. Supposedly, this transcription factor then activates as set of genes ...
0
votes
0answers
20 views

What is this white bird called?

White bird that looks like a pigeon or a dove. Does anyone know what it’s called?
-2
votes
0answers
8 views

How can a cell increase oxidative phosphorilation capacity by increasing mitochondrial mass?

Assume that a cell wants to increase oxidative phosphorylation capacity by increasing mitochondrial mass. How is the coordination between the nuclear genome and the mitochondrial genome coordinated? ...
-2
votes
0answers
20 views

Is it possible to greatly reduce the number of car accidents and still save almost everybody who needs an organ transplant?

According to this petition, after somebody dies, their organs can save 8 lives but some people die waiting for an organ transplant and the problem could be solved by switching from an opt in system to ...
-2
votes
0answers
10 views

What is the highest range mosquito can be detected via Microphone?

Just wondering when a mosquito attack at night I can hear it around my head, shoulders upper corps. Is it any statistic how far our ears or a microphone could detect it is nearby?
2
votes
2answers
26 views

Umbrella term for agonist, antagonist, inverse antagonist, etc.

For most receptors there exist different ligands that induce different responses. Depending on the response these different ligands can be classified into different groups such as agonists, ...
0
votes
0answers
9 views

can “Pandanus amaryllifolius”[used in cooking] become poisonous if grown near drainage

how do they absorb wastes and become not suitable for eating
1
vote
0answers
30 views

Mushroom Identification

I live in central Ohio and found these mushrooms growing on our 10 acre property. What is it and are they edible?
1
vote
0answers
29 views

Friendly Spider found at home, London

What kind of spider is this? It was very friendly and shy, we spotted it inside our house and we carefully took it to the forest. Hope it will be a nice environment for this kind of spider... One of ...
4
votes
1answer
46 views

Very frequent multiple births in humans

18th century Feodor Vassilyev is said to have had children by two wives, each of whom only ever had twins, triplets or quadruplets. His first wife has 16 sets of twins, 7 of triplets and 4 of quads; ...
1
vote
1answer
23 views

Question about the quantity of orchid species and genera

One flower which I am reminded of is the orchid and conjointly, the Orchidaceae family. I am surprised when discovering there is an abundance of species and genera, hence I would like to know the ...
25
votes
3answers
4k views

Can one see flickering of a light bulb at 50 Hz?

Yesterday I had a BBQ with some friends. The sun had already set and the only light source left (besides some ambient light from the world around) was a low energy light bulb. After a while I started ...
2
votes
1answer
14 views

What is the signal conversion from hair cells to cochlear nerve cells?

If I understood correctly, inner hair cells generates a graded potential (receptor potential), this potential maps the stereocilia deflection. On the other hand, the cochlear nerve cells transmit ...
-1
votes
0answers
28 views

How to preserve tissue DNA without using formalin?

Except using formalin to preserve human corpse for autopsy. I heard from the news that technique damages the DNA in the organs Question: Suppose corpse will be investigated next by another juridical ...
0
votes
0answers
8 views

Soybeans' bitter taste

What specific substances cause the bitter taste of the cooked soybeans? Is there a way they can be removed, except cooking?
0
votes
1answer
19 views

Test question regarding botany

I'm having a hard time understanding what exactly those letters and numbers in the task in the photo below represent, also the task says "Is the blossom formula written correctly?" translated from ...
-3
votes
0answers
26 views

Grey hair of an 87 year old with Alzheimer’s turning black again [duplicate]

My Mother who is 87 years old and has been completely gray for the last 25 years is growing black hair again. She is in the later stages of Alzheimer’s and has not dyed her hair, for over three years. ...
-1
votes
0answers
29 views

Why dont retroviruses rapidly kill everything

A retrovirus infects a cell and it explodes with thousands of copies in hours. A human has 100 trillion cells. Assuming that these parameters are correct then every human infected with a retrovirus ...
0
votes
0answers
10 views

Why, evolutionarily, does the genus Latrodectus have such potent venom?

As far as I know, the venom of most species of spider in the family Theridiidae is not dangerous to humans. However, the genus Latrodectus is well known for having venom medically significant to ...
-2
votes
0answers
23 views

Why is the macromolecular composition of a human cell seemingly hard to find?

I am trying to find a 3D rendering or list of molecules by volume in a cell (originally I was searching for human, but I'll take any at this point!). I understand the open-endedness of the question: ...
3
votes
0answers
53 views

what snake is that in northern italy

Full size Full size Full size Full size About 75 cm long. Thin tail. Camping site near Grado, Italy, northern Adriatic sea. It climbed a tree in the rough bark and i followed it to take these ...
2
votes
0answers
41 views

Could the Immune Gene HLA-B27 be gentically altered, snipped, switched off, replaced, edited within the body

Could the Immune Gene HLA-B27 be genetically altered, snipped, switched off, replaced, edited within the body.? Thousands upon thousands suffer immune disease as do I from this highly implicated gene....
0
votes
0answers
7 views

Spore stain comparing the bacterial spores to vegetative cells

What really are the basis of the spore stain.How to perform the procedure for a successful spore stain.can you please differentiate between Bacterial spores and vegetative cells. How can you describe ...
-1
votes
0answers
18 views

Why glucose is not stored as it is and why it is stored as glycogen in liver? [on hold]

Is glucose stable? Or is there any other reason for glucose being not stored in liver
0
votes
0answers
10 views

finding chromosome bands of a list of genes

I have performed a meta-analysis on 6 datasets of bovine microarray data. I need to find the chromosome bands of all differentially expressed genes achieved from the analysis. How can I do that?
1
vote
1answer
21 views

Which kind of drugs get absorbed through epidermis?

Some drugs such as nicotine can be administered through skin. I thought the layers of skin are designed to prevent in-flow of any chemical/germs. Not all drugs get absorbed in this fashion. So do ...
0
votes
0answers
34 views

Insect identification - Is this a baby cockroach?

This bug was found in a kitchen in Augusta, Georgia. I've seen it three times in two days (and some more in the past). Two nights ago, It was on my arm. Last night, I saw one on the kitchen floor and ...
1
vote
1answer
20 views

Consensus symbols in multiple sequence alignment

I was using multAlin for multiple aligning a set of sequences. The output I and came across included the following documentation (English corrected): Consensus symbols: ! is any of IV $ is any ...
-1
votes
0answers
8 views

Can you explain how interspecific competition can affect the population of a species? [on hold]

Can you explain how interspecific competition can affect the population of a species?
2
votes
1answer
17 views

B cell clones and affinity maturation

As B-cells undergo affinity maturation, their BCR sequences change. Are they still considered to be part of the same clone? I couldn't find a clear answer in response to this very similar question: ...
1
vote
1answer
27 views

Is there a family equivalent to “congener”?

Is there an equivalent word to "congener" but for species in the same family (family in the sense of the taxonomic rank)? "confamer"? "confamiler"??? I know I can just say "species X and other taxa ...
0
votes
0answers
37 views

Evolved female chromosome

I was told many years ago by a dr who has since retired, that I had a very special chromosome combination. She explained that I had xx stacked on top of another perfect xx. She also referred to it as "...
2
votes
0answers
12 views

How does latency in carcinogenisis differ from the effect of chance?

Most chemically induced cancers seem to have a long latency between exposure to the carcinogen and expression of the disease. Mesothelioma typically 30-40 years, bladder cancer about 20 years, for ...
3
votes
2answers
72 views

Humans have Cannabinoid receptors. Does that mean we're meant to consume cannabis?

I know the answer is no. But what then explains the name of these receptors being specific to Cannabinoid found in cannabis? Aren't Cannabinoid receptors exclusive to Cannabinoid? Why are they named ...
0
votes
0answers
17 views

What are the normal IC50 values for doxorubicin at 48h and 72h?

Different IC50 values are reported in papers for the U937, K562 cell lines and PBMC and all of them are given on ng ml. I do not understand well, why these values change too much, even if the ...
-1
votes
1answer
37 views

What does “dissipated” mean here?

This is the context: You know cardiac muscle cells are small cells relative to skeletal muscle cells, but unlike skeletal muscle cells that are arranged in parallel and their contraction is ...
2
votes
1answer
66 views
+50

How does transcription end?

In rho-dependent termination in prokaryotes, how does RNA polymerase “know” that it has reached the end of a gene and that it has to stop so that the rho-factor can bind mRNA’s rut site? Is there a ...
1
vote
1answer
45 views

Can people be bred for tameness in a similar way to Russian foxes?

Russian foxes were selectively bred for tameness. https://en.wikipedia.org/wiki/Domesticated_red_fox Can a similar process happen to humans, under the right conditions - say extreme political ...
0
votes
0answers
20 views

Bipolar disorder genetics

My understanding is that bipolar disorder is polygenic. 1) Does one need to have all the genes for bipolar disorder in order to have the disease? 2) Is it possible for a person to have all the genes ...
0
votes
0answers
7 views

What is the best media for tissue culture except ms medium?

What is the best media for tissue culture except ms medium?I have found that ms media is used most because of its compatablity,but I am trying to find a new media like gomber,whites etc.which one is ...
-1
votes
0answers
23 views

Why is melanin brown or black?

Why is melanin only black or brown in the visual spectrum? Melanin absorbs UV A and B in the ultraviolet spectrum, but it reflects brown light in the visual spectrum. What exactly give it it's ...
0
votes
0answers
16 views

Are there any slime molds dangerous to humans?

Are thany any pathogenic slime molds (several kinds of unrelated eukaryotic organisms that can live freely as single cells, but can aggregate together to form multicellular reproductive structures)?

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