Of the gases listed, which one is formed by the decomposition of living things?
a. methane
b. ozone
c. argon
d. helium

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

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

Plants need carbon dioxide from their environment to produce glucose during which stage of photosynthesis?