ecology jan 26

ecology jan 26 - Nautral selection 5 important points 1....

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Nautral selection 5 important points 1. more offspring are born than survive a. cockroaches b. dandelion 2. environmental resources are limited a. water b. sunlight c. dirt/soil d. nutrient e. nesting/mating sites f. root space 3. struggle to survive a. Darwin= competition b. Wallace = environmental pressure 4. Individuals of one species are variable a. Species- members can interbreed and produce live, viable offspring b. Variable- means there are variations (not every tree looks like every tree) c. These variations are traits that must be able to be passed o n to next generation 5. Darwin’s definition of natural selection a. Have differential survival and reproduction of individuals with certain advantageous traits that will contribute disproportionately to the makeup of offspring I the next generation b. Differential = unequal. You’ll have differential survival, not everyone will. Differential production, not everyone reproduce
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This note was uploaded on 02/04/2012 for the course ECOLOGY 101 taught by Professor Dr.clark during the Spring '07 term at Rutgers.

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ecology jan 26 - Nautral selection 5 important points 1....

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