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Biology : Recent Questions and Answers (Page 12)

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

What are the long term consequences of settling an isolated territory with an extremely limited gene pool?

I remember reading about a discredited theory - I'm afraid that, despite some frantic Googling, I've been unable to track down a link - which stated that Australia was first...

Asked on 09/29/2021

1 answer

Are there known life expectancy differences in non human mammals by sex?

In humans either for biological or cultural reasons there are life expectancy differences by sex. But how about non human mammals? Are there known life expectancy differences in non human...

Asked on 09/29/2021

1 answer

In ketogenesis, why is acetacetyl-CoA not directly hydrolized to acetoacetate in ketogenesis?

Ketogenesis pathway maps show acetoacetyl-CoA converted to HMG-CoA and only then to the first ketone body acetoacetate. Why this detour instead of directly hydrolyzing off the CoA to...

Asked on 09/27/2021

2 answer

How many hematopeietic stem cells (in percentage) does the bone marrow contains?

I've found out that the body marrow of an adult weights about 5% of it's total weight. How much (%) of the bone marrow consists of hematopeietic stem cells and...

Asked on 09/26/2021 by NumLock

0 answer

Are all dead plant cells (that die to do a job), have secondary wall?

Can we say that all plant cells that die to do a job (they are dead now), like the outer cell surface of the root cap, have secondary cell wall?...

Asked on 09/26/2021

2 answer

What was the largest flying insectoid pollinator?

Megachile pluto is a large resin bee whose body length may reach 38 mm and a wingspan of 63.5 mm. But that's nothing compared to the prehistoric...

Asked on 09/25/2021

0 answer

Steroid hormones: how do they travel through the cytoplasm (not just the blood plasma) if they're hydrophobic?

I get that steroid hormones need hydrophilic plasma protein carriers (eg albumin, TBG) to travel in the plasma because they're not soluble in the plasma. However, I don't see any...

Asked on 09/25/2021

3 answer

What would sanitiser fail to do that detergent and warm water would do in cleaning glasses frame that isn't 'visibly soiled'?

Update (from comment):It's certainly possible that the manufacturer had that in mind when making their cleaning recommendation, but I'd like to think they would specifically warn against it if...

Asked on 09/25/2021

2 answer

RNA polymerase Sigma subunit: transcription factor, coenzyme, or what?

Studying prokaryotic transcription, it seems that the α2ββ′ω core enzyme + the sigma (σ) subunit comprise the ‘holoenzyme’ required for prokaryotic transcription. In traditional enzyme nomenclature, this would indicate that...

Asked on 09/05/2021

1 answer

Why is thoracic breathing dominant in women while abdominal breathing is dominant in men?

In human males, lateral movement of thorax constitutes 25% of breathing while abdominal movement accounts for 75% of breathing. It is exactly the opposite in the case of women. I...

Asked on 09/05/2021 by Meerkat

0 answer

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