Which of the Following Statements About Respiratory Adaptations Is False

Which of the following statements about respiratory adaptations is false?

A) Internalization of respiratory surfaces leads to the need for ventilation.
B) External gills are found only in invertebrates.
C) Some fishes ventilate their gills by swimming constantly with their mouths open.
D) In fish, water flows unidirectionally into the mouth, over the gills, and out from under the opercular flaps.
E) Desiccation of the respiratory surface is more likely to occur in lungs than in gills.