"" are specialized cells that generate and conduct electrical impulses throughout the body. a. red blood cells b. white blood cells c. muscle cells d. neurons e. epithelial cells

What do many animals use for transport

Waianapanapa beach in hawaii is a black-sand beach that was formed by waves crashing against volcanic rock. the sand can be very hot on sunny days. which statement best explains why? o a. the black sand has no heat capacity. b. the black sand absorbs no radiation. o c. the black sand is immune to insolation. d. the black sand has a low albedo.

Substances that can pass through cell membranes by diffusion include a. na ions. b. proteins c. glucose. d. oxygen.