A scientist uses materials in her lab to cut a DNA sample into fragments.
What process is the scientist using
A. Karyotyping
B. Polymerase chain reaction (PCR)
c. Use of restriction enzymes
D. Gel electrophoresis

Researchers want to use edna to look for an invasive species in the water which of the steps would be likely do last

Which coal field location is related to coal fields in the eastern united states and supports the theory of continental drift? eastern india southern africa western australia northern south america

What is the main reason that attitudes are more often revealed in spoken rather than written language? a. in writing, we try to put the "best face" on what we write. b. we speak far more often than we write. c. in writing, we can more easily conceal our attitudes. d. in spoken language, we are often careless in our use of words.