In lecture you learned that llamas have hemoglobin affinity for oxygen similar to that of the bar-headed goose because they face similar selective pressures in their native habitats. What other species did you learn about in lecture whose foraging behavior would help explain why the emperor penguin has the hemoglobin saturation curve shown above, rather than one or more similar to the duck?
A) human fetus
B) goldfish
C) pregnant human
D) beaked whale
E) mole rat
Answer: D) beaked whale