5. What is blood volume and how is it related to blood flow?

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 element provides strength to the exoskeleton of clams and oysters

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins