You Are Interested in the Effect of Increased Carbon Dioxide

question 42

Multiple Choice

You are interested in the effect of increased carbon dioxide versus normal air on the growth of corn plants as well as the effect of green light versus full sunlight on the growth of corn plants.Your plan is to set up your experiment inside a greenhouse where you can control the environment.Which of the following is an aspect of the experiment that should be considered and controlled?

• A)An increase in carbon dioxide should not result in a substantial decrease of other necessary gases.
• B)All seedlings come from one uniform strain.
• C)The intensity or brightness of the green light equals the intensity of the full sunlight.
• D)All temperatures and available water remain the same for all plants.
• E)All of the choices are important considerations.

---

Definitions:

Area

The extent or measurement of a surface; the size of a two-dimensional space.

Z-score

A statistical measure that indicates the number of standard deviations a data point is from the mean.

Normal Random Variable

A random variable that has a distribution defined by a normal curve, characterized by its mean and variance.

Mean

A measure of central tendency calculated by dividing the sum of all values in a dataset by the number of values.