Which Characteristic of Monotremes is Ancestral to Amniotes

Question

Which characteristic of monotremes is ancestral to amniotes?
A)produce milk
B)have hair
C)lay eggs
D)differentiated teeth
E)are bilaterally symmetrical

Accepted Answer

Monotremes, like reptiles and birds, lay eggs instead of giving birth to live young. This is a characteristic that is ancestral to amniotes, a group of animals that includes reptiles, birds, and mammals with amniotic eggs.