The cells involved in blood clotting are
A. platelets.
B. hemoglobin.
C. white blood cells.
D. red blood cells.
Answer: A
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What approach to control pollution is exemplified by the Clean Air Act?
taxation consumer choice subsidies command-and-control
A weather warning means that: a. hazardous weather conditions have terminated
b. hazardous weather conditions are either imminent or are already occurring. c. atmospheric conditions favor the formation of hazardous weather. d. None of these choices.
A molecule of hemoglobin is capable of binding how many molecules of CO2?
A) 1 B) 2 C) 3 D) 4
What is the discharge of a river that has an average width of 20 meters, an average depth of 5 meters, and an average velocity of 3 meters per second?
A. 150 cubic meters per second B. 100 meters squared C. 300 cubic meters per second D. 15 meters squared per second