Two important contrasts between seagulls and wild geese are
a. migration and size.
b. long-distance flying and feeding habits.
c. feeding habits and migration.
d. size and long-distance flying

The two contrasts between seagulls and wild geese are migration and their sizes. One way they are similar is that they can both fly for great distances. The other way is that they are similar is that are both very large in size. The correct answer is A. 

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.