What was the population of the Earth (as of the book's publication)?
A) over 7 million
B) nearly 2 billion
C) over 7.4 billion
D) 670 million
E) nearly 2 trillion
C) over 7.4 billion
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IPM (integrated pest management) is becoming widespread as a way to control pests. This method
A. first uses chemical controls to maximize yields. B. has been shown not to be effective in commercial agriculture. C. first uses cultivation such as intercropping, then uses biological controls, and then uses chemical controls in hard hit areas. D. uses a mixture of several modern pesticides applied at one time. E. first uses chemical controls, then biological controls and then cultivation.
All the following traits show genetic variation in humans except
A. hair color. B. neck length. C. hair length. D. eye color.
The Transcontinental Arch represents portions of the Canadian shield not covered by seas in the Sauk
transgression. Indicate whether the statement is true or false.
Africa has large urban areas.
Indicate whether the statement is true or false.