Sexual Maturation in Boys Results from

question 54

Multiple Choice

Sexual maturation in boys results from

• A)observational learning of male sex roles.
• B)increases in the levels of testosterone.
• C)decreases in the levels of estrogen.
• D)increases in the levels of estrogen.

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Definitions:

Trophic Level

The position an organism occupies in a food chain, based on its source of nutrition and energy.

Energy

Capacity to do work and bring about change; occurs in a variety of forms.

Atmosphere

The layers of gas surrounding a planet, held in place by gravity, and composed of various gases that protect and sustain life on Earth by absorbing ultraviolet solar radiation, warming the surface through heat retention, and reducing temperature extremes between day and night.

Photosynthesis

The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.