Alfred Wallace, Charles Darwin and Natural Selection
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Lamark believed that organisms changed over time by passing on traits acquired during an individual's lifetime to its offspring. As a consequence, he believed giraffes evolved longer necks to reach moer desirable leaves on higher branches because their necks stretched and they passed that trait on.
Darwin, on the other hand, postulated that some giraffes had longer necks than others and over time those who were most successful at surviving interbred until the desirable characteristic was dominant. The competition for survival meant that those giraffes who were unsuited for the environment died.
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Evolution
Evolution 101 -- Berkeley tutorial
There is a lot of information here. Spend some time investigating all of the links.
Speciation
Allopatric Speciation |
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Types of speciation
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Genetic Drift and Gene Flow
Adaptive Radiation
Homology and Analogy
http://eweb.furman.edu/~wworthen/bio111/homanal.jpg
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Why the Eye? homology and analogy interactive tutorial
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Cloning
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Fiction Suggestion: The House of Scorpion by Nancy Farmer
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Recombinant DNA
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Learn about the history, techniques and production of recombinant DNA
Image from the World of Biochemistry blog http://worldofbiochemistry.blogspot.com/2011_11_01_archive.html
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