How does water vapor release energy into the
a. runoff
b. condensation
c .evaporation
b. precipitation

I agree it is precipitation, because of the kinetic energy the water vapor has when falling out of the sky.

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."

your answer should be c) enjoy!