Choose the answer that best completes the sentence below Humans have invented many tools that allow us to access a wider portion of the electromagnetic spectrum ..Humankind has given itself unique powers for collecting information about the world.

A:However
B:as a result
c:since
d:although

and i’ma be givein 20 points each question i ask

a time line cause it goes from 685 to 978

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."