which designation, period or group denotes the number of orbitals the element has? What does the other designate

the answer is b: 1.4 km/hr

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."

i think its white blood cells

i hope this