The animals that were the first to develop four limbs

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

The term equestrian relates to which animal? bulls cows horses pigs

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?