An Animal Digestive Tract That Consists of Two Openings (A

question 14

Multiple Choice

An animal digestive tract that consists of two openings (a mouth and anus) is called

• A)an intestine.
• B)a mammalian crop.
• C)the alimentary canal.
• D)an excretory system.

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Definitions:

Slope

The measure of the steepness or incline of a line, often calculated as rise over run in the coordinate plane.

Dependent Variable

A variable in an experiment or study whose changes are determined by the presence or variation of one or more independent variables.

Independent Variable

Variables in a study that are presumed to influence or determine the dependent variable, essentially the cause in a cause-and-effect relationship.

Least Squares Estimate

A method of estimating the parameters of a linear regression line by minimizing the sum of the squares of the differences between the observed and predicted values.