Salinization of water used in irrigation has reduced crop yields by ____
a. 10 percent
b. 25 percent
c. 33 percent
d. 50 percent
e. 75 percent
ANSWER: b
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It is clear from current research on human behavior genetics that _____
a. animal models of human disease are not useful for behavior research b. epigenetics does not play a significant role in behavior disorders c. few abnormal behaviors have an environmental component d. most abnormal behaviors are due to single-gene effects e. abnormal behaviors are not due to single-gene effects
How many phenotypic classes may be generated from a three-point testcross?
A) (3)2 = 9 B) (2)3 = 8 C) (3)3 = 27 D) (2)2 = 4 E) It cannot be predicted.
Human are only one species of many different primates that prefer to walk upright on two legs
Indicate whether the statement is true or false
In a market economy, a supply restriction occurs when a single firm monopolizes a market
a. true b. false