According to the textbook, humans have always migrated, beginning about ________ years ago
A) 500,000
B) 200,000
C) 100,000
D) 60,000
E) 30,000
Answer: B
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Which of the following describes the prevailing wind at Vancouver, British Columbia (latitude 50° N),
A. easterly B. southwesterly C. westerly D. northwesterly
What is the key mechanism maintaining genetic variation in most populations?
A) asexual reproduction B) biotechnology C) inbreeding D) mutation E) sexual reproduction
Air in an anticyclone
A) converges aloft. B) flows along the surface toward the center of the high. C) is moved by strong horizontal pressure gradients. D) cannot be affected by a jet stream. E) all of the above
Which of the following is the large, broad area that all the others are a part?
A) Drainage basin B) Interfluve C) Valley side D) Drainage divide E) Valley bottom