An embryo grows into a multicellular organism made of a wide variety of cell types. how does the variation in cell types occur

In which of the following ways is the function of the surface of a microsphere similar to the function of an actual cell membrane? a.both make it possible for the conditions in the interior to be different from the conditions outside. b.both provide a barrier that keeps water from flowing across it so the interior remains dry. c.both separate the rna that forms in the interior from any rna that might form in the environment. d.both can actively move molecules into the interior or out into the surrounding environment.

Which taxon group is more specific, in regards to organisms that are in that group? mammalia animalia

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