Which of these characteristics affects the diffusion oxygen into the icefish's blood? a. Icefish hearts are colorless. b. Icefish gills are white. c. Icefish have transparent, scale-less skin. d. Icefish have clear, thin blood.

Answer: Icefish have transparent, scale-less skin

Without scales, oxygen diffuses directly through Icefish skin.

Explanation:

The Icefish exhibit many adaptations that protect them against cold environment. These fishes are adapted to lack scales thus they are transparent. These fishes do not have red blood cells. As the scales are absent the oxygen is diffused inside the body directly. They also produce the antifreeze proteins which are responsible for preventing the formation of ice crystals in the blood.