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:

Confidence Intervals

Intervals that are calculated from the observed data and provide a range that likely includes the true parameter of the population, expressed at a certain confidence level.

Sample Increases

The process or act of enlarging the sample size in statistical experiments, aiming to make findings more reliable by reducing sampling error.

Level of Significance

A threshold used in statistical testing to determine whether to reject the null hypothesis, commonly denoted as alpha (α).

Confidence Coefficient

The probability level or percentage that measures the degree of certainty in a confidence interval.