Which of the following is true of the atomic weight of an element?
A) It is the weight of heaviest isotope.
B) It is the weight lightest isotope.
C) It is the weight of the most abundant isotope.
D) It is a weighted average obtained from the weights and abundances of the isotopes.
D
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The organelles that build proteins in cells are called
A. mitochondria. B. ribosomes. C. lysosomes. D. Golgi apparatuses.
Which model of the internal social structure of the city explains that a city grows outward from a central area in a series of five rings, like the growth rings of a tree?
A) The concentric model B) The sector model C) The multiple nuclei model D) The adaptive concentric model E) The successive hierarchy model
Mediterranean agriculture is common in all of the following except:
A) Yemen B) Turkey C) Morocco D) Tunisia
Which biome would be found primarily in the temperate zone?
A) deciduous forest B) desert C) tundra D) boreal forest E) savanna