In the United States,the Average Age of Menarche

question 8

Multiple Choice

In the United States,the average age of menarche

• A)has increased rapidly over the last century.
• B)has declined significantly since the mid-nineteenth century.
• C)is likely to decrease substantially in the coming decades.
• D)has remained unchanged over the last century,except for a slight increase in the incidence of precocious puberty.

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Definitions:

Instinctive

Behavior or actions that are innate and driven by natural tendencies or genetic programming, rather than learned experience.

Homeostasis

Homeostasis is the self-regulating process by which biological systems maintain stability and equilibrium while adjusting to conditions that are optimal for survival.

Biogenesis

The scientific principle that living organisms only come from other living organisms through reproduction, contradicting the idea of spontaneous generation.

Valence

The intrinsic attractiveness or aversiveness of an event, object, or situation, reflecting its perceived positive or negative value.