A dolphin inherits DNA from its parents. Exact copies of each parent's DNA are passed down to the offspring dolphin. Which statement about DNA replication is most important for preserving the genetic code from one generation to the next?

DNA follows base-pairing rules.

Replication takes place at many places at the same time.

DNA always remains in the nucleus.

Both parents' DNA have identical backbones.

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."

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.

well, i believe that the answer is 2. : 3