A fossil that can be used as a marker in time is called what? A. An index fossil
B. A fossil record
C. A trace fossil
D. A coprolite

You can tell from this karyotype that the individual is female because the karyotype has two chromosomes labeled

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

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots