The most promising immediate alternative to gasoline fueled vehicles in a time of global climate change and the inevitable scarcity of oil is powering vehicles using
A) solar power.
B) hydrogen as a fuel source.
C) fuel cells using hydrogen.
D) plug-in hybrid electric vehicles.
D
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The evolution of Laurentia can be described as continental growth by the accretion of younger terranes to an Archean
core. a. True b. False
If the earth were in a warming trend, which of the processes below would most likely act as a
negative feedback mechanism? a. increasing the water vapor content of the air b. increasing the snow cover around the earth c. decreasing the amount of cloud cover around the globe d. increasing the carbon dioxide content of the air
The vadose zone is also known as the
A. recharge zone. B. unsaturated zone. C. confined zone. D. saturated zone.
Pyridoxal phosphate is a metabolically active form of which of the following vitamins?
A) vitamin B6 B) vitamin B12 C) vitamin D D) vitamin E