Gas Exchange Requires a Surface That Is Both ______

question 38

Multiple Choice

Gas exchange requires a surface that is both ______.

• A) ciliated and flagellated
• B) protected within the body and connected to the circulatory system
• C) thin and moist
• D) permeable to oxygen and impermeable to carbon dioxide

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Definitions:

Variable

An element, feature, or factor that is liable to vary or change, used in experiments to test hypotheses or build models.

Variable

Any characteristic, number, or quantity that can be measured or counted and can vary among subjects in a study.

Interval

A range between two points or numbers, typically used to specify the extent of a measurement or the difference between numbers.

Nominal

Denotes categories without numerical importance, used to describe data that represents names or labels.