1.The movement of plants and animals form Asia to America indicates ______.
A.that they could not have traveled across the Bering Strait
B.that Asia and the Western hemisphere were connected by a large land mass
C.that the Bering Sea was an isthmus at one time
D.that migration was in the one direction only
2.The author is refuting the notion that _____.
A.life arose in America independently of life in Europe
B.the first settlers in America came during the sixteenth century
C.a large continent once existed which has disappeared
D.man was a host to animals and plants
3.By using the words boxed the compass (in Line 7) the author implies that _____.
A.the migration of mankind was from West to East
B.the migration of mankind was from East to West
C.mankind traveled in all directions
D.mankind walked from Asia to America
4.One reason for the migration not mentioned by the author is _____.
A.overcrowding
B.favorable environmental conditions
C.famine
D.the existence of a land bridge
5.We may assume that in the paragraph that follows this passage the author argues about______.
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