Which organ System - Which is made up of glands which release
hormones into the bloodstream – works with the nervous systems to
regulate body temperature and blood pH levels and blood sugar
levels?

Dwarf galaxies are select one: a. relatively rare. b. not very bright c. mostly spiral shaped. d. none of these.

Why is excretion necessary to maintain homeostasis?

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils