natural selection

Natural selection - Dolphins sharks • Speciation o Splitting of one species into two OR o One species changing over time to be a new species

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**Change in order of topics 4/3 Ch 31: Hormones 4/5 Ch 38: Hormones 4/10 Ch 38: Hormones of Reproduction 4/12 CH 27: Plants Natural Selection Natural selection as an agent of change o Types of Selection Directional Stabilizing Natural Selection at work o Bergmann’s Rule Warm blooded (endothermic) organisms are larger in colder climates Convergent Evolution o Organisms with different genetic backgrounds come to look alike o Similar selection pressures lead to similar adaptations
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Unformatted text preview: Dolphins, sharks • Speciation o Splitting of one species into two OR o One species changing over time to be a new species o (Results from changes in alleles frequencies) o Species: organisms that can interbred and produce fertile offspring o Speciation (splitting) Mechanisms Isolation through: • Space • Time Resulting • Reproductive incompatibilities...
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This note was uploaded on 03/26/2008 for the course BIOL 101 taught by Professor Hogan during the Spring '08 term at UNC.

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