What known medicine could someone use for lean .?

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

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

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