Geologists have not studied the composition of the oceanic crust by
A) dragging buckets along the floor to collect sediment and rocks.
B) studying the contents of drill holes.
C) examining aboveground mountain ranges.
D) analyzing earthquake data.
Answer: D
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Which of the following is closely associated with the former position of a river channel?
a - cutoff meander b - meander scars c - oxbow lakes d - oxbow swamps e - all of the above
Consider drops of water that leak from a dripping faucet. As the drops fall, they
A) get closer together. B) get farther apart. C) remain at a relatively fixed distance from one another.
Rain forests are likely to have high species richness.
Answer the following statement true (T) or false (F)
Which of the following is not an adrenergic messenger?
A) dopamine B) histamine C) serotonin D) None of these, they are all adrenergic messengers.