All of the following are adaptations of diving marine mammals for extended submersion times ...

All of the following are adaptations of diving marine mammals for extended submersion times except:a.
   breathing in an extra supply of oxygen before a dive.
  b. high concentrations of myoglobin.
  c. greater blood volume per unit mass, compared to nondiving mammals.
  d. a larger than typical spleen.
  e. the collapse of lungs at fairly shallow depths.

Question 2

Decompression sickness is caused by:
  a. dissolved gases coming out of solution and forming gas bubbles.
  b. the concentration of hemoglobin dropping markedly.
  c. chloride ions precipitating from solution.
  d. the pH of the blood rising too rapidly.
  e. carbonic anhydrase being inhibited.