Which correctly lists three water sources that contribute to a river system? A. groundwater, ponds, streams B. lakes, rivers, ponds C. rivers, streams, watersheds D. streams, lakes, oceans

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.