The left ventricle of the heart . receives oxygen-poor blood from the lungs
pumps oxygen-rich blood to the body
receives oxygen-rich blood from the rest of the body
pumps oxygen-poor blood to the lungs

Cells tend to have a relatively small and uniform size. why aren’t cells larger?

Which of these statements are true about scientific theories and hypothesis

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.