The placenta is the site of exchange for: a) Nutrients and mucus between the mother and the fetus b) Milk and waste between the mother and the fetus c) Nutrients and waste between the mother and the father d) Nutrients and waste between the mother and the fetus

How are extrusive rocks formed? magma gets trapped inside earth and cools to rock. volcanoes apply force to solid rocks and eject them. magma gets forced to earth’s surface and cools to rock. volcanoes trap lava inside earth, where it cools to rock.

Four types of motile cells in human body?

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.