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Re: Vitamin D absorption for different skin types

... to be an area that is just beginning to draw research interest. Darker skin evolved in high light-exposure populations to protect deeper skin layers from UV damage, but tones lightened in pops with lower exposure, to allow enough UV to reach the D-generating skin tissues. Dark-skinned people ...

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by Darby
Tue Jul 15, 2014 7:39 pm
 
Forum: Human Biology
Topic: Vitamin D absorption for different skin types
Replies: 1
Views: 572

Meiosis prophase I crossover

... homologous chromosomes that results in recombinant chromosomes.” http://en.wikipedia.org/wiki/Chromosomal_crossover Question: Due to the multiple layers of winding, how can parts of the chromosome break evenly? Is it possible that the winding mechanism provides chiasma (break) points in advance? ...

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by gs99
Fri Mar 07, 2014 9:23 pm
 
Forum: Molecular Biology
Topic: Meiosis prophase I crossover
Replies: 0
Views: 2340

Re: Irrefutable Facts Against Evolution

... Fact Check: Did Bill Nye Tell A Huge Lie About The Fossil Layers? http://thetruthwins.com/archives/fact-check-did-bill-nye-tell-a-huge-lie-about-the-fossil-layers Does A Belief In Evolution Lead To Racism? ...

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by Meranda
Sat Feb 22, 2014 10:43 pm
 
Forum: Evolution
Topic: Irrefutable Facts Against Evolution
Replies: 52
Views: 57125

Re: 7 deadly sins in nature

... make out quite what the transgression was. Their rules of conduct are difficult to make out because we do not understand their languages or social layers. For instance an animal can half kill a subordinate and not be ostracised but if it even argues with a superior it can be thrown out. Finding ...

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by animartco
Wed Jan 15, 2014 1:11 pm
 
Forum: Zoology Discussion
Topic: 7 deadly sins in nature
Replies: 6
Views: 3442

Re: Re:

... needle is very sharp. For blood culture purposes the skin is also carefully disinfected, but even that does not remove the bacteria from the deep layers of the skin. However, the skin bacteria are normally not very well adapted to growing in blood and thus any pathogens in the blood tend to stand ...

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by snowathlete
Fri Dec 13, 2013 2:08 pm
 
Forum: Microbiology
Topic: What do you think these are, in my blood?
Replies: 16
Views: 9252
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