Which of the following best describes ecological succession? a. the change in the genetic makeup of a species over time b. the change in the number of populations in a community over time c. the change in the composition of species in a community over time d. the change in populations over time

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