Allopatric speciation is most likely to occur after a(n) ____
a. earthquake
b. mountain building
c. volcanic eruption
d. pet is lost
e. pond is dredged
b
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A savanna differs from a steppe in that the grasses are
A) intolerant to freezes in a savanna. B) only in riparian zones in a savanna. C) taller in a savanna. D) in drier areas in a savanna.
Uncontaminated rain water has a pH of 5.6 (slightly acidic) because
A. oxides of sulfur are always present in the atmosphere, even from natural sources. B. upon condensation, water chemically reacts with carbon dioxide forming a weak carbonic acid. C. most water vapor originates by evaporation from the oceans and sea water is acidic. D. droplets of water necessarily condense on atmospheric particulate.
The nature of current leadership in Azerbaijan illustrates that country's move toward democracy since the fall of the Soviet Union
Indicate whether the statement is true or false
Cyclones forming over the North Pacific generally travel further southward during the winter
Indicate whether the statement is true or false