The primary reason it is important to maintain lots of different types of apples and lots of genetic variability is in order to have a greater chance of having genes that might allow apples to be resistant to future diseases. a. True
b. False

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