Centers of low surface pressure are commonly referred to as _________ while centers of high surface pressure are commonly called __________.
a. anticyclones, ridges
b. cyclones, anticyclones
c. anticyclones, cyclones
d. cyclones, ridges
b. cyclones, anticyclones
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Mexico City's poor air quality is exacerbated by
A. frequent temperature inversions. B. air temperature that is warmer at the surface than aloft. C. El Nino events. D. winds that sweep down the mountains.
Continents consist of the portion of land above sea level only
a. True b. False
Removal of ________ will always result in the greatest changes in an ecological system
A) a competitive species B) a decomposer species C) a producer species D) a keystone species E) a carnivore species
The relationship between clownfish and sea anemone is called ____.
A. interspecific competition B. predation C. parasitism D. mutualism E. commensalism