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Biology : Recent Questions and Answers (Page 17)

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

In a skeletal muscle contraction, what happens after ACh binds to the nicotinic iontropic receptors on sarcolemma?

Does the bound ACh becomes unbound and then gets hydrolysed by acetylcholinerase?...

Asked on 08/22/2021

1 answer

When can we know if one develops immunity (to SARS-CoV-2)?

I've been thinking for this for a while. It seems there's no ethical experiment to perform to check if immunity is actually developed (the obvious experiment would be to expose...

Asked on 08/22/2021 by skyking

0 answer

Tree Identification - California Bay Area

I've seen these trees in the Bay Area in Mountain View and Fremont, and have been searching for different pine tree varieties that have wider canopies. Does anyone here know...

Asked on 08/22/2021 by foobarometer

1 answer

What do spider digestive fluids look like?

What is the general appearance of the fluids that spiders use to digest their prey before they ingest it into the body?...

Asked on 08/22/2021

1 answer

The fraction of the genome that is evolutionarily conserved through purifying selection is less than 10%?

I would appreciate help in understanding the meaning, logic, and, in particular, how to interpret the phrase:The fraction of the genome that is evolutionarily conserved through purifying selection is less...

Asked on 08/22/2021 by user663837

1 answer

Why do dragonflies lose all of their coloration once they die?

At 06:43 in The Secrets of Nature video Sky Hunters, The World of the Dragonfly - The Secrets of Nature the narrator says:Scientists have been collecting dragonflies...

Asked on 08/22/2021

1 answer

Which species of Agave are known to have inedible flowers?

It is well documented that many species of Agave have edible flowers, however I keep coming across statements to the effect that "most species" of Agave have edible flowers. This...

Asked on 08/22/2021 by botanica

0 answer

How did the "serendipitous rediscovery" of Sulfasalazine as an antirheumatic agent after 30 years happen?

This excellent answer describes the history of the ~50 year old drug Sulfasalazine, and it's worthwhile to take a moment and read through the answer now. Roughly speaking the...

Asked on 08/22/2021

1 answer

Do ring species exist?

In trying to understand evolution better, I have been looking at examples of speciation, and have thus come across the topic of ring species. I have tried...

Asked on 08/22/2021 by Niobius

1 answer

flavivirus virus genome, methylated guanine

I'm looking at the sequence of a flavivirus virus genome (mRNA). Kindly see the link MH900227.1. How can I identify the Guanine nucleotide that is methylated in...

Asked on 08/22/2021

2 answer

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