A Friend Who Is Not a Biologist Tells You That

question 31

Multiple Choice

A friend who is not a biologist tells you that she grows irises from iris roots.You explain to her that the "root" she is planting is not a root,but instead is called a rhizome."Why?" she asked.You explain.

• A)"A root grows vertically,not horizontally."
• B)"A rhizome has nodes and internodes and is really a modified stem that can exist underground."
• C)"A root stores nutrients,rhizomes are underground stems that do not store nutrients."
• D)"A rhizome,although a modified stem,acts as a root does.In other words a rhizome is a stem-root combination."
• E)"A rhizome is a modified root that is able to grow leaves."

---

Definitions:

Variable Selection

A process in statistical modeling where the most relevant predictors or variables are chosen to create the most efficient and accurate models.

Error Standard Deviation

Represents the measure of dispersion or variability for the errors in a dataset, typically assessing the precision of predictions in a regression model.

Predictor Variables

Factors in statistical models that predict or account for variations in the outcome variable.

Regression Coefficient

A coefficient that represents the degree of change in the dependent variable for one unit of change in an independent variable in a regression model.