4. What technique would a scientist use to produce many copies of a
desired piece of DNA?||

They can use a technique called Polymerase Chain Reaction. This can be done in a test tube or even in a organism. It usually relies on something called  Thermostable DNA Polymerase and Taq polymerase. It requires DNA primers that is designed specifically for that DNA region (interest).

the sunflower because each experiment got the same results

hope this !

-payshence