During the Long-Term Evolution Experiment (LTEE), Investigators Found a Cit⁺

question 56

Multiple Choice

During the Long-Term Evolution Experiment (LTEE) , investigators found a Cit⁺ strain of Escherichia coli that allowed fast growth on citrate buffer after 33,000 generations. The ability to catabolize citrate evolved at this time through

• A) acquiring the ability to exploit new ecological niches.
• B) becoming pathogens.
• C) becoming dependant on a symbiotic partner's resources.
• D) becoming pathogens and becoming dependent on a symbiotic partner's resources.
• E) losing the ability to exploit new ecological niches.

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