If We Study Identical Twins Who Have Been Separated at Birth

question 161

Multiple Choice

If we study identical twins who have been separated at birth and reared apart, we can

• A) only test the importance of genetic endowment.
• B) learn a lot more about intelligence than we can by studying the influence of the environment.
• C) assess the relative contribution of heredity and environment.
• D) say very little about the impact of heredity or environment on intelligence.

Interpret the shape of the PPF and what it indicates about opportunity costs (constant, increasing, or decreasing).

Relate the concepts of investment, savings, and economic growth to shifts in the PPF.

Explain how the PPF illustrates the trade-offs between producing different combinations of goods.

Understand how efficiency and inefficiency are depicted by the PPF.

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