Sound travels faster in
A. air.
B. a vacuum.
C. water.
D. steel.
Answer: D
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Europe's two most populous cities are:
A. Rome and Madrid B. London and Paris C. Paris and Berlin D. Berlin and Rome
Mutations involve some kind of change in _____
A)species B)chromosomes C)alleles D)offspring E)populations
Latitude is a major control of temperature since latitude determines the Sun angle
Indicate whether the statement is true or false
The snail kite (Rostrhamus sociabilis) is a specialist that feeds on only one specific type of snail. By comparison, the Mallard Duck (Anas platyrhynchos) is a generalist that feeds on diverse food sources
Whereas the snail kite has a very limited range, the Mallard Duck has a very broad range. The snail kite's diet is an example of a(n) A) habitat B) limiting factor. C) ecological niche. D) range of tolerance.