In October, 2011, the World's Population Reached a Total of ________

question 55

Multiple Choice

In October, 2011, the world's population reached a total of ________ billion and is expected to reach ________ billion by 2040.

• A) 9; 14
• B) 10; 12
• C) 7; 9
• D) 7; 15
• E) 9; 11

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Definitions:

Lack of Money

The state of not having sufficient monetary resources, which can affect one’s ability to satisfy basic needs or attain certain goals.

Generalization Gradient

A measure of the degree to which a conditioned response is elicited by stimuli that resemble the original conditioned stimulus.

Color-blind Monkeys

Primates that lack the ability to distinguish certain colors, used in research to understand color vision and perception.

Concurrent Discrimination

A type of discrimination training in which two or more stimuli are presented at the same time, and the correct response depends on distinguishing between these stimuli.