A(n) apron of fallen rock fragments called ________ is generally found at the base of a slope affected by rockfall.
A. grus
B. talus
C. loess
D. fluvial
E. alluvial
Answer: B
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A population of beetles in which some individuals are blue and some individuals are green evolves by chance because more alleles of one color are transmitted to the next generation than alleles of the other color
This mechanism of evolution is known as A) natural selection. B) mutation pressure. C) genetic drift. D) gene flow.
The most mobile dunes are:a
longitudinal. b. transverse. c. barchan. d. parabolic. e. none of the above
The opportunity to lobby elected representatives is an important right for everyone in a democracy.
Answer the following statement true (T) or false (F)
Which of the following is NOT true of calderas?
A. They form from the collapse of the ground surface into an emptied magma chamber below. B. They are bounded by steep topographic scarps with a generally basin-shaped outline. C. They are produced by removal of easily eroded pyroclastic materials. D. They commonly contain layers of volcanic ash and volcanic domes.