The total amount of living material in an ecosystem is referred to as ____
a. biomass
b. a food chain
c. mosaic
d. a life zone
a
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On which landmass does a continental glacier exist?
a. Europe b. North America c. South America d. Greenland e. Eurasia
Which of the following is not true of annexation in the U.S.?
A) Rules concerning annexation vary among states. B) Normally, land cannot be annexed into a city even if a majority of residents in the affected area vote in favor of doing so. C) Peripheral residents generally desired annexation in the nineteenth century, because the city offered better services, such as water supply, sewage disposal, and trash pickup. D) Today's cities are surrounded by a collection of suburban jurisdictions whose residents prefer to remain legally independent of the large city. E) As U.S. cities grew rapidly in the nineteenth century, the legal boundaries frequently changed to accommodate newly developed areas.
Northern English cities have experienced gradual ________ in the postindustrial period
A) economic growth B) increasing fertility rates C) economic decline D) railroad construction
How do waves propagate across the water?
A. the wave moves forward but water moves in a circular motion B. water within the wave travels as far as the wave does C. water near the surface moves less than water at depth D. All of these choices are correct.