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Lenski and Travisano Compared What Happened to the Fitness of Cells

Question 9

Multiple Choice

Lenski and Travisano compared what happened to the fitness of cells in 12 replicate lines of E.coli.According to the graphs above,which of the following statements is (are) true? A) After only 500 generations, natural selection had already increased fitness in the evolving strains. B) Average fitness decreased substantially over the first 2000 to 3000 generations. C) Average fitness increased substantially over the first 2000 to 3000 generations. D) A and B E) A and C Lenski and Travisano compared what happened to the fitness of cells in 12 replicate lines of E.coli.According to the graphs above,which of the following statements is (are) true?


A) After only 500 generations, natural selection had already increased fitness in the evolving strains.
B) Average fitness decreased substantially over the first 2000 to 3000 generations.
C) Average fitness increased substantially over the first 2000 to 3000 generations.
D) A and B
E) A and C

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