Where does water in stream and rivers originate

(99 points) be serious! how do farts work? how do you fart without it stinking? serious answers only

What does polymerase chain reaction (pcr) do? o a. separates dna fragments by size o b. cuts a dna sample into fragments o c. provides an overall picture of a person's chromosomes o d. makes more copies of a sample of dna

One of the reasons that stars are so large is because