Which Statement About Biologically Important Gases Is TRUE

Multiple Choice

Which statement about biologically important gases is TRUE?

A) O₂ and CO₂ are the most important gases for living things and are therefore very soluble in water.
B) O₂ and CO₂ are both polar and are therefore very soluble in water.
C) O₂ and CO₂ are both nonpolar molecules and are therefore both poorly soluble in water.
D) CO₂ contains polar bonds but O₂ is nonpolar; therefore, CO₂ is very soluble in water, but O₂ is poorly soluble in water.
E) All biologically important gases are very soluble in water.