Biology Weekly Newsletter

Biology newsletter

Top new questions this week:

Why does polyploidy give an evolutionary advantage?

I would like to know what advantages polyploidy holds. I have come across a few examples during my research of polyploidy, for example human adults' hearts contain 27% diploid, 71% tetraploid and 2% ...

genetics genomes polyploidy  
asked by FloriOn 9 votes
answered by Wolgast 2 votes

Should we induce fever to assist healing?

I am currently reading "The Fundamentals of Anatomy Physiology" 10th edition, and have found it an incredibly interesting book. I have just been reading about the lymphatic system, and the various ...

human-biology physiology metabolism cell  
asked by Stevo 8 votes
answered by Ilan 1 vote

Flower (?) identification (Shanghai, China March 2015)

As per the title. The plant appears to have fleshy protrusions resembling flowers growing out of its stem (although I am unable to identify them as such). Anyone has an idea on the identity of ...

botany species-identification  
asked by March Ho 8 votes
answered by Chris 12 votes

Is there a significant difference in sedentary calorie-burn between a thinker and non-thinker?

I've read that, on average, a sedentary female burns between 1,600 - 2,000 calories and a sedentary male burns between 2,000 and 2,500 calories. I've also read that the brain itself burns quite a few ...

brain energy  
asked by AmagicalFishy 8 votes
answered by anongoodnurse 9 votes

Behavioral change in dolphins during different hemispheres activity periods?

It is known that dolphins never sleep in the sense that we do, instead they have one hemisphere of the brain sleeping while the other one is awake. I wonder, do they show observable changes in ...

neuroscience sleep  
asked by noncom 6 votes
answered by Jay 2 votes

Splice in with CRISPR/Cas

I need to splice a gene into a human cell genome, with highest rate possible. I mean, doesn't really matter where the gene enters, nor does it matter if some cells die as a result of this. CRISPR ...

genetics molecular-genetics  
asked by Barbos 5 votes
answered by user137 0 votes

Is there a formula for determining the % of ligand bound to a given receptor in a mixture with multiple ligands and receptors?

When a ligand and receptor interact with a given kd, one can easily determine % of ligand bound to the receptor when the kd, total concentration of ligand, and total concentration of receptor are ...

protein-binding enzyme-kinetics  
asked by Taylor Stevens 5 votes
answered by A. Kennard 5 votes

Greatest hits from previous weeks:

What are the functions and differences between axons and dendrites?

My textbook doesn't do a very good job of pointing out what the differences between the two are. It basically mentions axons only in the same breath as the synapse (that synapses are the endings/tips ...

neuroscience neurophysiology  
asked by Lesbihonest 2 votes
answered by user3795 2 votes

Why was the Davson-Danielli model rejected?

According to my textbook, Davson-Danielli's model of a phospholipid bilayer sandwiched between two layers of globular protein was incorrect. The nonpolar protein portions would separate the polar ...

cell membrane  
asked by Alzeon 4 votes
answered by Chris 6 votes

Can you answer these?

How can I see that the human hand has 27 degrees of freedom?

I have counted the degrees of freedom in my hand over and over and I keep getting the number 19. Suppose each finger has 3 degrees of freedom. Then 5 * 3 = 15. The wrist can rotate around or back and ...

asked by Illegal Immigrant 1 vote

Expected time for a neutral allele to reach a frequency of $p_1$ when starting at frequency $p_0$

Kimura and Ohta (1968) show that the expected time for a neutral allele to reach fixation (given that it will reach fixation) is $$\bar t(p_0)=-4N\left(\frac{1-p_0}{p_0}\right)ln(1-p_0)$$ , where ...

evolution natural-selection mathematical-models population-dynamics population-genetics  
asked by Remi.b 5 votes

How do BCAA's promote faster muscle recovery?

I am aware that ingesting Branched chain amino acids (BCAA's) prior, during, and after workouts has an effect on muscle recovery due to their difficulty of metabolism. However, how much more ...

proteins muscles  
asked by SpeedOfLight 1 vote
Subscribe to more Stack Exchange newsletters

Unsubscribe from this newsletter or change your email preferences by visiting your subscriptions page on

Questions? Comments? Let us know on our feedback site. If you no longer want to receive mail from Stack Exchange, unsubscribe from all emails.

Stack Exchange, Inc. 110 William St, 28th Floor, NY NY 10038 <3