Which country of East Asia has taken recent steps to acquire and develop nuclear weaponry, triggering concern in the U.S.?
A) North Korea
B) Japan
C) Taiwan
D) South Korea
E) China
A) North Korea
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Which of the following pairs of index minerals do not overlap in metamorphic grade?
A) chlorite and pyroxene B) biotite and garnet C) staurolite and kyanite D) amphibole and sillimanite
Briefly explain how coal forms. What will be an ideal response?
Which of the following best matches the description?An environmental condition, the absence of which, prevents the success of an organism.
A. limiting factor B. interspecific competition C. intraspecific competition D. trophic level E. biomass F. producer G. herbivore H. omnivore I. denitrifying bacteria J. nitrogen cycle K. community L. carbon cycle M. habitat N. secondary consumer O. nitrogen-fixing bacteria P. ectoparasite
The Great Lakes are sensitive to pollution because ____ of the water that enters the lakes is flushed out via the St. Lawrence River.
A. 25% B. 10% C. about half D. less than 1% E. most