After yet another patron dripped sweat on her desk, the clerk at the gym complained, "It's gross working at a gym, with everyone sweating all the time." "Yes," the manager replied, "and it's probably costing us more for ________, but I'll bet we're saving on ________."
A. weight machines; treadmills
B. towels; heating
C. the water cooler; towels
D. the water cooler; air conditioning
Answer: D
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In the accompanying figure, why does the curve sharply drop after approximately 45°C instead of mirroring the slope
of the line going from 0-40°C?
a. At high temperatures, the reactions proceed so quickly that enzymes are no longer helpful or required. b. This is true of all catalysts and is not due to any special features of enzymes.
c. The kinetic energy of the reactants is so great that it destabilizes the enzyme and diminishes the enzyme's activity. d. The kinetic energy of the reactants is lower than that of the products, forcing a change in enzyme activity. e. The enzyme begins to denature above a certain temperature, eliminating all catalytic activity of the protein.
In __________ speciation, a geographic barrier
interrupts gene flow between populations. Fill in the blank(s) with the appropriate word(s).
Most human cells contain ________ chromosomes
A) 36 B) 46 C) 2 D) 23
A person with a normal total cholesterol level:
A) is at high risk for an acute cardiac event if his or her HDL levels are elevated. B) will probably not develop coronary artery disease, even if his or her HDL levels are low. C) will likely not experience an acute cardiac event, even if his or her LDL levels are elevated. D) is still at risk for coronary artery disease if his or her LDL levels are elevated.