What is the primary difference between a food web and a food chain?
a)chains contain many food webs

b) webs contain several food chains

c)omnivores are found only in food webs

d)first-level carnivores are unique to food chains

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

Which are reasons cells undergo cell division?

The wind is to parities grasses because it them