How can an anaerobic respiration experiment be changed to give a reproducible way to measure rate of reaction?

answer; /// i do believe the correct answer is (

the answer is golgi apparatus

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."

the animal that would be cutest if scaled down to the size of a cat? elephant