The "Southern Beech" Tree Is Found in Such Diverse Places

question 26

Multiple Choice

The "Southern Beech" tree is found in such diverse places as Australia, South Africa, and South America. People did not transplant it. How did it probably get to these widely separated locations?

• A) Glaciers split what was once a continuous, huge population of beeches.
• B) Seeds were carried by birds.
• C) The simultaneous creation of the same species occurred in different geographic locations.
• D) These landmasses were once connected and later drifted apart.
• E) Seeds were blown by the prevailing winds.

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Definitions:

Independent Variables

Variables in an experiment or model that are controlled or changed to test their effects on dependent variables.

Observed Values

The actual values that are measured or collected during an experiment or survey.

Predicted Values

In statistics, these are the estimated outcomes based on a regression model or other predictive model.

Coefficient of Determination

A statistical measure represented by R² that assesses the extent of variance in a dependent variable that is predictable from the independent variable(s).