Members of the Enterobacteriaceae can be distinguished from each other by
A. the presence or absence of the enzyme oxidase.
B. the ability to ferment lactose.
C. motility.
D. both motility and the presence or absence of the enzyme oxidase.
E. both motility and the ability to ferment lactose.
Answer: E
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The communities established under pure stands of eastern hemlock will likely become extinct because of ____
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