Indirect selection
A. is necessary to isolate auxotrophic mutants.
B. uses media on which the mutant but not the parental cell type will grow.
C. uses media that reverses the mutation.
D. uses media upon which neither the parental cell typeor mutant grows.
E. is necessary to isolate auxotrophic mutants AND uses media upon which neither the parental cell typeor mutant grows.
A
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