Which of the Following Would Not Be a Characteristic of an Organ

Question

Which of the following would not be a characteristic of an organ used for gas exchange?
A)high surface area
B)covered by waterproofing layers
C)moist surfaces
D)very thin tissues

Accepted Answer

A waterproof layer would prevent gas exchange, so an organ used for gas exchange would not be covered by waterproofing layers. The other characteristics (high surface area, moist surfaces, very thin tissues) are all necessary for efficient gas exchange.