The Data of Huey and Colleagues (1989)on Thermoregulation in Garter

question 25

Multiple Choice

The data of Huey and colleagues (1989) on thermoregulation in garter snakes is an example of the ________ method evolutionary biologists use to test hypotheses about adaptations.

• A) situational
• B) experimental
• C) observational
• D) phylogenetic contrast
• E) comparative

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Definitions:

Variable Cost

Expenses that vary directly with the level of production or sales, such as materials and labor costs.

Pretax Income

Pretax income is the amount of income earned by a business before taxes have been deducted.

Fixed Costs

Costs that do not change with the level of production or sales volume, such as rent or salaries.

Variable Costs

Costs that vary in direct proportion to changes in the level of production or sales volume.