Which molecules can cross the lipid bilayer of a membrane directly

Which of the following correctly list the first appearance of organism in the fossil record from earliest to most recent

When elements that form a mineral dissolve in hot water, they form a mixture called a(n) a)geode b)vein c)evaporation d)crystallization e)magma f)lava g)solution h)gem

Which is not a characteristic of bacteria? a. they are unicellular. b. they are prokaryotic. c. they are the smallest form of life on earth. d. they are multicellular.