Using radioactively labeled DNA probes in studies of heredity makes it possible for a scientist to:
A. produce clones with DNA from two different species.
B. cause new mutations that will not add variation to a species.
C. make many more copies of a target gene with PCR.
D. study the inheritance of traits that are not seen as a phenotype.

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.

c is the answer. hope this