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Natural Selection and CAs Bao-Hoi Nguyen CS240 Spring 2003 Overview • • • • • • Introduction Wolfram vs. Darwin Optimal The Leopard has an Internal CA Evidence Against Natural Selection Conclusion Introduction • Lots of complexity and diversity seen in nature. Need an explanation • Darwin: Origin of Species • Wolfram: CAs Wolfram vs. Darwin • To many parts • Interbreeding • Finches Optimal • • • • Definition Some animals have advantages Wolfram’s explanation Why only human? The Leopard has an Internal CA • Animal • SeaShells • Plant Animals • Pattern looks complex • Same patterns seen on all animals • 2D CAs easily reproduce Seashell • Patterns • Shapes • 1D CA Plants • Leaf and tree shapes • Fibonacci numbers • Golden angle Evidence Against Natural Selection • The neck of the giraffe • The first cell Conclusion • Natural selection is questionable • Wolfram’s theory is legitimate
![Line {pt1, pt2, }]is a graphics primitive which represents a line](http://s1.studyres.com/store/data/016208919_1-a4fbe67f9f9c75fe0ecfae82249682ed-150x150.png)
![Absz] gives the absolute value of the real or complex number z.](http://s1.studyres.com/store/data/006060645_1-4da7dcdb6b1f296970b27e2814ef15e2-150x150.png)
![EvenQexpr] gives True if expr is an even integer, and False otherwise.](http://s1.studyres.com/store/data/006081548_1-73224aa2271709e7c1cebae5338a8306-150x150.png)
![OddQexpr] gives True if expr is an odd integer, and False otherwise.](http://s1.studyres.com/store/data/017766559_1-a6c1087f2df268ab0d6ad756faf7499e-150x150.png)
