The Black Hills, South Dakota, is a dome-shaped mass which is built over a ______.
a - stock
b - batholith
c - dike
d - vein
e - laccolith
e - laccolith
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The poor soil conditions of the Arctic tundra support only stunted vegetation and, as a result, no large animals.
Answer the following statement true (T) or false (F)
When it was first proposed, Alfred Wegener's continental drift hypothesis was heavily criticized by earth scientists. What was one of their primary objections to the continental drift hypothesis?
A. Wegener falsified some of his data to better fit his hypothesis. B. Wegener did not offer an explanation for how the continents move. C. Wegener couldn't explain the worldwide distribution of fossil species. D. The continents did not fit together as well as Wegener initially claimed.
How many DNA base pairs are wound around the histone core of a nucleosome?
A) 47 B) 97 C) 147 D) 197
There are ____ latitudinal zones of insolation and temperature that circle the Earth
a. six b. ten c. fourteen d. twenty