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How Evolution Works 6- The Constraints of Evolution

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Uploaded by on Jul 6, 2008

I discuss the many constraints hindering evolution. Understanding these allows you to understand why things are formed the way they are.

Meckel's Cartilage- http://www.palaeos.com/Vertebrates/Bones/Gill_Arches/Meckelian.html

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  • I feel a little bit smarter after watching each of your vids. Also, a little stupider about how I used to think. Thanks.

  • i loled when he said camel toe am i a perv ?

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  • It is amazing how God has limited his abilities to match the limitations of a man-made theory.

  • Your link is no longer correct.

  • 0:33 ROFL!! Hey I know this is an old video but sybilsden might be able to help with exotic kitties. ;-D

  • TYRANNOSAURUS X

  • I clicked, am I too late for the free cake?

  • @HULLOHULLO15 All tissues of an organism come to be from specific cells that exist in an embryo.

    For example all tissues and organs (nerves,bones,hands,legs,teeth etc) in humans come from 3 layers of cells in an embryo.These layers appear at about the 3rd week and are named : exoderm,mesoderm and endoderm.The cells composing these layers have high differential abilities and thus are able to create diverse tissues.Mutations in these cells cause changes (and sometimes major changes) in tissues.

  • I still don't understand how structural adaptations happen? How do animals change over time i.e. the human hand... can someone simplify this for me?

  • when you say T-rex head size is inversely prop. to hands size, is that just an hypothesis made to explain why they have small hands, or is there any actual relative of T-rex, whose genome has been sequenced, and this gene affecting both traits was found?

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