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

question 1

Multiple Choice

Which of the following is the most likely explanation for the absence of a protective 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:

Financial Choice Act

U.S. legislation proposed to roll back regulations set in place by the Dodd-Frank Wall Street Reform and Consumer Protection Act.

Global Food Security Act

United States legislation aimed at promoting global food security, resilience, and nutrition through various programs and initiatives.

Edward Kennedy Serve America Act

A 2009 U.S. law aimed at expanding national service programs to address critical societal issues through volunteerism and service.

Evolution

The gradual development or change of something over a period.