Both answers b and d are macromolecules so either one would be correct. personally i would put b
AIR AND SOIL (SPECIFY ATMOSPHERE)<span />
I believe its single cell? Im not sure though.
Answer:
Controlled variables include time, temperature, volume of solution being tested, and volume and concentration of reagent (Benedicts or iodine) used. Three unknown solutions will be tested for the concentration of reducing sugars using Benedict's solution.
Explanation:
