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Unformatted text preview: Note also that the graphs do not imply that there is a constant extinction rate per unit time. The approximately linear relationship indicates that the taxa with a long duration do not appear more resistant to extinction . Van Valen proposed the Red Queen hypothesis to account for the pattern of approximately linear survivorship curves. Van Valen hypothesized that 1) the environment is continually deteriorating (~ changing so that current adapted state is no longer applicable), 2) organisms have to adapt continually, i.e., you have to " run to stay in place " like the Red Queen said to Alice in Through the Looking Glass (Alice in Wonderland)....
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This note was uploaded on 11/06/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.
- Fall '10