What extracellular structure helps prokaryotes move

Which of the following is not a main characteristic that scientists focus on when determining which kingdom an organism belongs to

Where can you find prokaryotic and eukaryotic cells?

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