I need help.

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

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.

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?