Which is not true about natural selection? a. there must be diversity in the population
b. It is driven by natural processors like predator or weather
c. Humans are involved and can select the most desirable organisms
d. predators, geological activity, and weather can all have an impact on organisms

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