The most recent Era on the Earth is ________
A) Permian
B) Eocene
C) Precambrian
D) Miocene
E) Cenozoic
Answer: E
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Which of the following conditions occurs during the negative phase of the North Atlantic Oscillation?
A. An increased pressure gradient exists across the North Atlantic Ocean. B. Pressure decreases near the coast of Greenland. C. The prevailing westerlies in the northern hemisphere are stronger. D. Winters in northern Canada are relatively mild.
What percentage of parent isotope is remaining if 2 half lifes have elapsed?
A. 6.25% B. 12.5% C. 25% D. 50% E. 100%
Volatile organic compounds, a primary pollutant, are also called hydrocarbons
Indicate whether the statement is true or false
Which of the following is considered to be a waste product of photosynthesis?
A) H2O B) CO2 C) O2 D) none of these