- the moon stays in a orbit around earth which statement describe the force between earth and moon ? (A) there is a gravitational force keeping them apart . (B) there is a gravitational force pulling them together . (C) there is a magnetic force pulling them together . (D) there is a magnetic force keeping them apart .

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."