Aquatic species that can tolerate freshwater and salt water would be well-adapted to which of the following aquatic environments? a. wetlands b. rivers c. estuaries d. oceans

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

Several billion years ago which gas was the least prevailant in the atmosphere

Which of the following does not make up ground substance of connective tissue? hyaluronic acid elastic fibers glycosaminoglycan proteoglycan