Lipid membranes have how many layers?
A) 1
B) 2
C) 3
D) 4
B
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Physicists refer to thermal energy as
A. potential energy. B. heat. C. internal energy. D. temperature.
Where has the deadliest political and ethnic conflict, with an estimated war-related 5 million deaths, in the region been?
A) Kenya B) Ivory Coast C) South Africa D) Democratic Republic of the Congo E) Uganda
In 1968, Garret Hardin described an environmental problem in which shared environmental resources may be depleted as individuals try to maximize their gains by disproportionately using the resource. He called this "The Tragedy of the Commons
" Which of the following threats to biodiversity best reflect this "Tragedy of the Commons"? A) The appearance of many deformed frogs from overuse of herbicides B) The accidental introduction of invasive species into North America C) The decline of fish populations due to overexploitation D) The fragmentation of natural habitat to build bridges and highways
The arrival of a cold front brings:
A) gentle rains. B) cumulonimbus clouds. C) mild weather. D) higher temperatures. E) stationary winds.