Why are antibiotics unhelpful for treating the common cold? A. Bacteria are not killed by antibiotics.

B. Antibiotics cannot treat illnesses.

C. Colds are caused by antibiotics.

D. Colds are caused by viruses.

Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.