Most DNA is found in the cell nucleus
B, the independent variable because this is the one that is purposefully changed in an experiment to test the hypothesis.
I believe that the answer to your question would be A. Heart Begins.
Answer:
As well as producing hormones, vaccines and other drugs genetic engineering has the potential to cure genetic diseases through gene therapy. The same techniques that are used to produce drugs can also have industrial applications such as producing enzymes for laundry detergent, cheeses and other products.
Explanation:
