How long does it take for a pregnant woman to give birth?

pregnancy usually lasts 9 months

the birthing process can last minutes to hours

9 months. But sometimes children are born premature which means they were born too early.

Hope this helps :)

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."

b. heterotroph

explanation: