this is a legit question is it possible to remove a part of the brain that produces saddnes and would that effect living if so explain

I am not sure of removing the part of the brain but there was an incident where a man got a rod in his head which penetrated through memory part of the brain but he still survived

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."

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds