Currents in the ocean basins of the Northern Hemisphere always run in what direction?
A. counterclockwise
B. clockwise
C. north to south
D. from the equator to the poles
E. from the poles to the tropics
B. clockwise
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One way in which organisms may exhibit resistance to a drug is the ability to pump the drug out of the cell immediately after it has entered.
Answer the following statement true (T) or false (F)
Food moves along the digestive tract as the result of contractions by _____
A) cardiac muscle B) smooth muscle C) voluntary muscle D) striated muscle E) skeletal muscle
Which of the following includes all the others?
a. sucrose b. glucose c. cellulose d. glycogen e. carbohydrate
The Western blot test is confirmatory for HIV because it
A. is more sensitive than the ELISA. B. uses an indicator of some sort to visualize the antibody. C. has fewer false positives than the ELISA. D. requires electrophoresis, whereas the ELISA does not. E. All of the choices are correct.