What is the primary role of the respiratory system in living organisms?
a. to make carbon dioxide
b. to obtain oxygen
c. to use up nitrogen
d. to find hydrogen

Which of the following will a bacterium produce when a human gene is added to its genome? question 4 options: human carbohydrates a protein made up of both human and bacterial properties the human protein coded for by the human gene human plasmids that can be isolated from the bacterium