The caudal fin of fast-cruising fish such as tuna is ________
A) forked
B) heterocercal
C) lunate
D) rounded
E) truncate
C
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Geothermal heat pumps may be used to exploit the temperature difference between the earth's surface and underground in the earth's mantle.
Answer the following statement true (T) or false (F)
An approach to geography that focuses on the characteristics of places and regions is called ________
Indicate whether the statement is true or false.
The drastic reindeer population changes on St. Matthew Island appears to have ultimately been caused by
A) the absence of any predators. B) the addition of a keystone species. C) the narrow reliance of reindeer on just a single food species. D) the introduction of grizzly bears to the island in 1962.
________ cycles control the amount of solar radiation received at important latitudes, and, therefore, control the temporal pattern of the ice ages
Fill in the blank(s) with correct word