Alligators and birds are thought to have more in common than lizards.In considering the clade that includes alligators and birds,which trait would be derived when comparing them to lizards?
A) Body shape
B) Four limbs
C) Egg laying
D) Four-chambered heart
E) Bones

Question

Alligators and birds are thought to have more in common than lizards.In considering the clade that includes alligators and birds,which trait would be derived when comparing them to lizards?  
A) Body shape
B) Four limbs
C) Egg laying
D) Four-chambered heart
E) Bones

Quizplus · Accepted Answer

Both alligators and birds have a four-chambered heart, which is a derived trait compared to lizards, who have a three-chambered heart.

Alligators and Birds Are Thought to Have More in Common