Which of the following biomes tends to be dominated by coniferous trees?
A) Tropical moist broadleaf forest B) Boreal forest
C) Temperate broadleaf forest D) Mediterranean forest
B
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Prostaglandins ________ the sensitivity of pain neurons, which become ________ with continued stimulation
A) increase; less sensitive B) increase; more sensitive C) decrease; less sensitive D) decrease; more sensitive
It is difficult to determine long-term trends in rare events such as extreme heat or extreme cold episodes using graphs such as this because [INSERT FIGURE 3-32. INCLUDE CAPTION]
A) data for rare events is not available prior to 1980 B) rare events might be the result of random variation C) rare weather events are usually caused by earthquakes rather than atmospheric activity D) rare events must be averaged over 25-year periods
The intertropical convergence zone may be found as far as ________ north of the equator in July
A) 5° B) 25° C) 65° D) 90° E) 135°
A planetary atmosphere with ozone could protect surface dwellers from
a. ultraviolet radiation. b. charged particles in the solar wind. c. meteor impacts. d. optical radiation