Which of the Following Is the Most Likely Explanation for the Lack

question 20

Multiple Choice

Which of the following is the most likely explanation for the lack of a filter blocking the passage of alcohol between the maternal and fetal circulations in humans?

• A) There has not been enough time to evolve such a barrier.
• B) Such a barrier would probably also block important molecules that need to be passed to the fetus.
• C) The maternal and fetal blood mix directly together in an area with many villi, so a barrier is impossible.
• D) Alcohol has some positive effects on the fetus, so evolution has resulted in an intermediate level of filtering that blocks all but the worst abuses of alcohol.

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Definitions:

Income Effect

The change in an individual's or economy's income and how that change will impact the quantity demanded of a good or service.

Manufacturing Wages

The compensation paid to workers involved in the production and assembly processes within manufacturing industries.

Industrial Country

A nation that has a significant level of industrialization, characterized by a high income per capita and diversified economy.

Demand For Labor

The total amount of labor that employers are willing and able to hire at a given wage rate in an economy.