Cholesterol, testosterone, and estrogen are
all examples of which are chemical
messengers that the body uses.
A. sugars
B. steroids
C. proteins

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

Each nephron is made up of capillaries that form the __ sweat glands bladder glomerulus ureter

Kendra has the ability to cover a distance in a short period of time. she is said to have a lot of agility power strength