(Q).
Q: Static friction acts on objects when they are resting on what? Choices: - a single point - their laurels - a pool of water - a surface A:
(A).
a surface

(Q).
Q: What phenomenon involves the forcing of a substance into a cell against its concentration gradient? Choices: - active absorption - osmosis - secondary transport - primary active transport A:
(A).
primary active transport

(Q).
Q: What do you call a device that produces a very focused beam of visible light of just one wavelength and color? Choices: - optical diffuser - fusion relay - light meter - laser A:
(A).
laser