What is the function of cholesterol molecules in a cell membrane?

a) they make it thicker
b)they make it porous
c)they make it more fluid
d)they make it less flexible

Diffusion and osmosis are forms of passive 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.

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