Consider the Figure Below

question 110

Multiple Choice

Consider the figure below. The bars show changes in primary productivity with and without endomychorrhizal associations for a group of plants that diverged early in the history of terrestrial plants. Which of the following statements supports the data shown in the figure?

• A)Endomycorrhizal associations do not increase primary productivity in these plants.
• B)Endomycorrhizal associations increase primary productivity in these plants.
• C)Endomycorrhizal associations only help these plants at high CO₂ concentrations.
• D)Endomycorrhizal associations only help these plants at low CO₂ concentrations.

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Definitions:

Normal Population

A population with a distribution that follows the normal (Gaussian) curve, where most measurements are centered around the mean.

Sample Mean

The average value calculated from a sample of data, often used as an estimate of the population mean.

Null Hypothesis

In hypothesis testing, it is the default hypothesis that there is no effect or no difference, and it is subject to test for possible rejection.

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The amount of cholesterol present in the bloodstream, important for assessing heart disease risk.