The oxygen-binding properties of haemoglobin vary among animal species as an adaptation to their respective environments and metabolic demands. The graph below shows the oxygen dissociation curves for three different haemoglobins, labeled Curve X, Curve Y, and Curve Z.
Which option correctly identifies Curve X, Curve Y, and Curve Z?
Curve X: active small mammal; Curve Y: adult human; Curve Z: lugworm
Curve X: lugworm; Curve Y: adult human; Curve Z: active small mammal
Curve X: adult human; Curve Y: active small mammal; Curve Z: lugworm
Curve X: lugworm; Curve Y: active small mammal; Curve Z: adult human
