Desert regions characteristically ____
a. have highly unpredictable frequencies and amounts of precipitation
b. receive low rates of potential evapotranspiration
c. experience low rates of weathering and erosion
d. experience one large and predictable dust storm per year
a
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What is a reduction?
A. the reaction of oxygen with a reductant B. the gain of electrons C. the loss of an electron from the valence shell D. the formation of red compounds in the presence of an oxidant E. the reduction of the number of electrons
El Niño and La Niña events occur in the _____and the _____are affected
a. Pacific Ocean; westerlies b. Atlantic Ocean; easterlies c. Atlantic Ocean; westerlies d. Atlantic Ocean; doldrums e. Pacific Ocean; trade winds
Lamarck's theory of inheritance of acquired characteristics was based on ____
A)the discovery of DNA B)the discovery of genes C)the discovery of mitochondria D)observation and interpretation E)experiments
The rate at which extinctions occurred prior to the evolution of modern humans is called the ____.
A. E.O. Wilson postulate B. species diversity index C. living planet index D. baseline extinction rate E. background extinction rate