Water's makes it an excellent solvent for salts, like sodium chloride, as well as other substances required by cells to carry out metabolic processes.

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."

within 30 of the equator hope this