Which of These Is Correct Concerning Menarche, the Onset of Menstruation

question 96

Multiple Choice

Which of these is correct concerning menarche, the onset of menstruation?

• A) Menarche is biological, so its timing does not vary.
• B) Menarche now occurs about six years earlier than it did a century ago.
• C) Menarche now occurs about four years later than a century ago.
• D) Menarche is a social, not a biological, phenomenon.

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Definitions:

Genetic Variables

Factors in an organism's genes that can affect its traits and behaviors, often studied to understand inheritance and variation.

Life Expectancy

The average period that an individual is expected to live, based on statistical averages, taking into account factors like current age, sex, and health conditions.

Physical Activity

Any movement produced by skeletal muscles that requires energy expenditure, including exercise and other movements.

Mammography Screenings

Medical tests that use X-ray imaging to detect breast cancer in women.