What is the biggest drawback for developing oil shales, tar sands, and coal gasoline?
A. Availability of these resources
B. Cost
C. There are no drawbacks
D. Imports of these are extremely cheap
Answer: B
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Which of the following landform definitions is CORRECT?
a. The taiga is a treeless area between the treeline and Arctic regions. b. The tundra is an area of coniferous forests. c. Permafrost areas suffer from continue drought. d. Steppes are semi-arid grasslands.
A genetically modified organism
A. can be designed to resist herbicides. B. cannot be sold as organic. C. typically has new genes added. D. All of these statements are correct.
Greenhouse gases trap ________ in the atmosphere
A) infrared radiation B) ultraviolet radiation C) visible light D) gamma radiation
The chief limiting factor to the success of most trout species is
A. the dissolved oxygen content in water. B. the amount of plant biomass. C. the ability to reproduce. D. All of these are correct.