Domestic and feral house cats in the United States
A) are a keystone species, controlling potentially huge populations of rodents.
B) provide the necessary population control for pigeons, starlings, and cowbirds.
C) kill more than one billion small mammals and birds annually.
D) spread viral infections to native carnivores.
C
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The large thermally driven convection cell that is driven by convective "hot" towers along the equator is the?
a. ?Ferrel cell. b. ?Hadley cell. c. ?Ekman spiral. d. ?El Niño cell. e. ?Doldrum cell.
The speed of sound in the ocean is about ________.
A. 1000 m/s B. 1500 m/s C. 100 m/s D. 3000 m/s E. None of these is correct
The type of strain that occurs depends not only on the kind of stress applied, but also on the:a
amount of pressure and degree of temperature. b. rock type. c. duration of the stress d. A and C e. A and B
Groundwater resides under the surface of the Earth, mostly in which areas?
a. the pores of soils b. the pores and cracks in rock and sediment c. the bottom of river beds d. both a and b