We have already talked about another class of chemicals that helps send signals in the body—neurotransmitters. How are neurotransmitters and hormones similar and how are they different?

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."

answer: blah

explanation:

bc blah