Which statement explains why oxygen molecules easily diffuse across a cell membrane while protein molecules do not? a. protein molecules form membrane channels that oxygen molecules can pass through. b. oxygen gas exists as molecules, but proteins are either liquids or solids. c. oxygen molecules fit between fatty acids, but protein molecules are too big. d. proteins contain oxygen that is more useful inside a cell than outside the cell.

Which locations on the map are low-pressure areas? a b c d e

Acarotenoid is a yellow-orange pigment that absorbs light. infrared blue-green yellow-orange ultraviolet

Which of the following describes research that would be considered basic science? a. a farmer is trying to improve his crop yields by using a new kind of fertilizer. b. a college students is curious about the growth of desert pants in the presence of excess amounts of water. c. government officials are trying to prevent the spread of new strain of influenza virus. d. a doctor is trying to determine why a patient is feeling tried and sick. b.a college students is curious about the growth of desert pants in the presence of excess amount of water