The elements or compounds that come out of a chemical reaction are

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."

d we did this already

garbage disposal because lysosomes dispose of old cell parts like garbage disposals dispose of old food.