Which of the Following, If Left to Stand Alone, Is

question 2

Multiple Choice

Which of the following, if left to stand alone, is the weakest evidence of a possible causal connection?

• A)There is a reasonable explanation for a cause and effect relationship.
• B)The data appear to have a pattern on the scatterplot.
• C)The connection was shown to hold under varying conditions.
• D)Potential confounding variables have been ruled out.

Identify the common chamber for air and food passage in humans.

Understand the structure and function of fish gills in gas exchange.

Recognize the unique characteristics of bird and mammal respiratory systems.

Understand the mechanisms of oxygen release from hemoglobin under different partial pressures.