Which of the Following Statements About U

question 197

Multiple Choice

Which of the following statements about U.S. consumer households is true?

• A) About 2 out of every 3 marriages ends in divorce--and at any given time only about 40 percent of all adults are married.
• B) More than half of all U.S. households consist of married couples with no children 18 or younger living at home.
• C) Single-adults account for nearly 40 percent of all households.
• D) Americans are marrying younger, but delaying child bearing compared to the older generation.
• E) None of the above is true.

Grasp the differences in trophic efficiency and primary consumption between aquatic and terrestrial ecosystems.

Learn the impact of physical and chemical environmental factors on ecosystem structure and function, including differences between desert and rainforest ecosystems.

Comprehend the principle of net primary productivity (NPP) and how it varies among different ecosystems and food web structures.

Understand the second law of thermodynamics as it applies to energy transfer in ecosystems and the implications for energy availability.