A(n) ________ is a long sinuous ridge of water-deposited cross-bedded and well-sorted sediment deposited by a stream that flowed within or under a glacier.
A. drumlin
B. moraine
C. esker
D. tarn
E. varve
Answer: C
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Fossil fuels replaced wood as the primary source of energy in developed nations.
Answer the following statement true (T) or false (F)
The four thermal layers of the atmosphere in order beginning from the surface are:
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In a protein antigen, how many amino acids are necessary for the antigen to bind to a receptor on a T cell?
A) 1 or 2 B) 3 to 5 C) 5 to 7 D) 10 to 15