What is the work of rudolf virchow trying to prove ?

The work of Rudolf Virchow was based on Theodore Schwann’s Cell theory in which all cells comes from pre – existing cells. The pre – existing cells that he theorized also include the dead matter in which it was later opposed by Francisco Redi.

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."