Inserting a portion of human DNA into the ring- shaped DNA of bacteria
Answer:
Soo... Is that the answer you chose?
Explanation:
I think is correct.
I would select B or C as the answer because i have no idea what the other ones are :)
B. Using fewer fossil fuels, such as gasoline for a car, reduces the emission of harmful pollutants into the air
Calcium
Calcium helps build and maintain bones.
