A source or supply from which a benefit is produced and that has some utility

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.

Many animals cannot sweat to maintain a stable body temperature. what is one other way animals can cool down?

In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .