Which of the Following Increases the Surface Area Available for Gas

question 23

Multiple Choice

Which of the following increases the surface area available for gas exchange among various organisms?

• A)finely divided inner lung surface in mammals
• B)tubular body shape,as in annelids
• C)finely divided gills in fish
• D)flattened body,as in planarians
• E)All of these choices increase surface area.

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