Which of the following is an example of a homologous structure or trait?
I. Leg bones of a human and leg bones of a penguin
II. Wing of a penguin and wing of a mosquito III. Beak of a penguin and beak of a duck
A - I, II, and III
B - II and III
C - I and II
D - II
E - I and III
Answer: E - I (Leg bones of a human and leg bones of a penguin) and III (Beak of a penguin and beak of a duck)
HOMOLOGOUS structures are shared between organisms which evolved from a common ancestor.