What 3 orders make up the class Amphibia

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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 correct answer is sex-linked recessive.

i just took the test

the answer is c. it will give up it's valence electron to the other atom.