By the End of the 20^th Century, the World's Population

question 42

Multiple Choice

By the end of the 20^th century, the world's population exceeded 7.4 billion, with Canada representing

• A) less than 0.5 percent
• B) slightly more than 5 percent
• C) about 320 million
• D) less than 3.2 million

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Definitions:

Masters And Johnson

Researchers who conducted pioneering studies on human sexuality and sexual response during the 1950s and 1960s.

Laboratory Investigations

Controlled experiments conducted in a lab setting to study psychological phenomena under controlled conditions.

Hormones

Chemical messengers produced by the endocrine glands that regulate various bodily functions and processes.

Testes

The male reproductive organs that produce sperm and hormones, including testosterone.