How do both a bird and a reptile reproduce?
a. they both lay eggs in the water.
b. they both lay amniotic eggs.
c. they both have live babies.

The answer is b. They both lay amniotic eggs.

Both birds and reptiles belong to a clade of vertebrates, Amniotes, which lay amniotic eggs. Mammals also belong to Amniotes. Amniotic eggs can remain within the mother after fertilization or can be laid on land. On the other side, anamniotic eggs are usually laid in the water.

It might. it might because if you think about if they discovered if we came from (lets say something funny like aliens) and thy found cells that matched and they would have t do more research about it but would most probably change their theory.