On a mountaintop, a person becomes out of breath quickly because fewer molecules are present per cubic meter of air.

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.

Which of the following best describes the relationship between glucose and complex molecules such as hormones?

In "the man in the water," what was the remarkable occurrence that rosenblatt reported?