In which of the following ways is the function of the surface of a microsphere similar to the function of an actual cell membrane?

Both make it possible for the conditions in the interior to be different from the conditions outside. Both provide a barrier that keeps water from flowing across it so the interior remains dry. Both separate the RNA that forms in the interior from any RNA that might form in the environment. Both can actively move molecules into the interior or out into the surrounding environment.

Explanation:

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).