The respiratory system contains which of the following structures and organs

so the larynx is a major part of it. If your choices are

Thyroid

Larynx

Hypothalamus

Pancreases

The answer is larynx

Explanation:

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."