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TOEFL
/
Listening practice
/ Section WE96
Listen to an Academic Talk
Listen to part of a talk in a biology class.
Listen
46. Why does the speaker discuss bacteria?
A
To show a case in which the standard criterion cannot be applied at all
B
To argue that bacteria should be classified by ecological role
C
To explain how genes are exchanged between related organisms
D
To suggest that bacteria evolve faster than other organisms