Question

In the Ames test, a ____________ number of colonies is observed if a substance ________ a mutagen, compared with the number for a control sample that is not exposed to the suspected mutagen.

A. significantly higher, is

B. significantly higher, is not

C. significantly lower, is

D. significantly lower, is not

Answer 1

In the Ames test, a significantly higher number of colonies is observed if a substance is a mutagen.

Step-by-step explanation:

In the Ames test, a significantly higher number of colonies is observed if a substance is a mutagen, compared with the number for a control sample that is not exposed to the suspected mutagen.