What would be the first step in using pcr to copy a gene?
a. dna polymerase adds nucleotides to separate strands.
b. various strands of dna are allowed to cool.
c. dna is heated to seperate stands.
d. copied strands are used as templates to make more copies.

The correct answer is C.

During the first step of PCR, called denaturation, the tube containing the sample of DNA is heated to more than 90 degrees Celsius (194 degrees Fahrenheit) which separates the double-stranded DNA into two separate strands. The high temperature  breaks the relatively weak bonds between the nucleotides that form DNA.

PCR stands for Polymerase Chain  Reaction. It is an efficient and cost effective way to copy or amplify small segments of DNA or RNA, now in wide use.

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.