https://padlet.com/william_hook/ux66ojtpmiii Each student will take a chapter from the reading "Into The Jungle," by Sean B. Carrroll, and summarize the the most salient information. en-us 2017-03-09 01:13:43 UTC 2017-04-08 04:01:04 UTC hello@padlet.com william_hook https://padlet.com/william_hook/ux66ojtpmiii/wish/158849510 This chapter was about an ice fish they found near Antarctica, and when they sliced it open they found the blood was colorless.  This was a great find in evolution, because before this it was thought that a trait every vertebrate had in common was red blood cells. "The icefish, a group of sixteen species, are the only blood-less vertebrates to have ever been discovered" (Carroll, 2009, p. 173). 

This chapter also talks about how the scientists were trying to figure out how the Icefish were surviving past the Antarctic freezing temperatures.   What they found were antifreeze glycoproteins (AFGP’s).  This extra glycoprotein allowed for the fish not to freeze.  This glycoprotein works by absorbing ice crystals and limiting the size of their growth.  

Another thing that proves evolution in action was the similarities between the AFGP gene and a distant trysinogen gene found in a giant Antarctic tooth fish  (Carroll, 2009).  This proves that the AFGP gene evolved from existing materials of DNA, rather than creating new ones.  When they first tried to study the ice fish, they brought it to warm water and it died.  This was because of the lack of oxygen that warm water has.  The cold stable temperatures of the Antarctic Ocean provide a constant supply of oxygen. 
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