Ecological succession
A. is initiated by indicator species.
B. never results in mutualistic species interactions.
C. generally results in very simple ecosystems.
D. rarely occurs as an orderly progression through clearly established stages.
E. always begins when vegetation grows on rock exposed by a retreating glacier.
Answer: D
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A prism- or wedge-shaped, structurally complex zone of faults, folds, and mostly metamorphosed rocks that forms along the upper parts of a subduction zone where sedimentary material and oceanic crust are scraped off the downgoing slab is called a(n)
A. accretionary prism. B. passive margin. C. foreland basin. D. subduction wedge.
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The rise of tuberculosis in the past few decades is largely the result of
A) the evolution of antibiotic resistance and increases in HIV infections, which compromise the immune system of people with TB. B) more people moving to large cities and living more closely together. C) the increased use of genetically engineered crops and drugs. D) the spread of mice and rats across the Earth.
Thunderstorms most likely form along which of the following weather fronts in winter?
A. occluded fronts B. cold fronts C. stationary fronts D. warm fronts