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Biology : Recent Questions and Answers (Page 52)

Find answers to your questions about Biology or help others by answering their Biology questions.

DNA extraction kit for microbial mats, rocks, and soil in a remote area

I am hoping to perform a metagenomics study of samples from a lava tube. It will be in a remote area (with no large scientific equipment) and I would need...

Asked on 03/19/2021 by thatbat

1 answer

Do sieve tube cells have any extrachromosomal circular DNA at maturity?

In order to generate a tube system of low resistance, sieve elements lose most of their cellular components such as the nucleus, cytoskeleton, ribosomes, tonoplast etc. Mature sieve elements contain...

Asked on 03/19/2021

1 answer

Why is peanut allergy often more dangerous then other allergies?

From reading public media I have the impression that while peanut allergy is not more common then pollen allergies, peanut allergy is often more problematic and sometimes even deadly.The most...

Asked on 03/19/2021

0 answer

Are junk DNA's mb also counted when it is stated that human DNA contains 3mb?

The human DNA molecule (chromosome) is about 2 meters in length. See here. We have 46 of them so in total 92 meters (imagine we would place...

Asked on 03/18/2021

1 answer

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...

Asked on 03/16/2021 by Mark H

2 answer

Trees growing around objects vs pushing them away. Where is the threshold?

If a tree grows against a taut wire then the tree will grow around it, eventually enveloping the entire wire. This often scars the tree, and if the wire is...

Asked on 03/16/2021 by bitsmack

1 answer

Complete list of touch sensitive plants

I am not sure whether the word "touch sensitive" is precise enough. What I am looking for is a list of plants that respond to touch noticably like Mimosa...

Asked on 03/16/2021 by Ahmed Abdullah

1 answer

What's a cells membrane potential without any leak channels?

Consider the following ion concentrations on either side of a cell membrane (in = inside cell, out = outside cell): $[text{Na}^+]_{text{in}} = 10mM$,$[text{Na}^+]_{text{out}} = 142mM$,$[text{K}^+]_{text{in}}...

Asked on 03/15/2021

1 answer

How many times did photosynthesis evolve?

Was it a 1 and done thing? Plants seem to have developed photosynthesis by the endosymbiosis of cyanobacteria. Is the latter the one time in Earth's history that the process...

Asked on 03/15/2021 by N Francis

2 answer

types of cells in a pharyngeal specimen

I would like to ask what type of cells should someone expect in a pharyngeal smear, in a person, who is infected with a viral infection. Thank you a lot!...

Asked on 03/15/2021

1 answer

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