You have just received a grade on your first major examination in biology, and it is not as high as you had hoped. You wanted an "A" and you earned a "C." You talk to your professor and do a lot of thinking about
what might have gone wrong. Perhaps your mistake was reviewing your notes only before the exam rather
than every night. Or perhaps you made some other mistakes.

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.

How does the nervous system affect the excretory system?

This is the interaction of two organisms where one is and the other is neither nor harmed.