Scientists have observed that pythons have vestigial leg bones. They have also observed that snakes in general have more DNA sequences in common with four-legged geckos than they do with legless eels. What do these two observations have in common?

A. They both suggest that geckos evolved from snakes.
B. They both suggest that pythons are more primitive than other snakes.
C. They both suggest that snakes evolved from an ancestor with legs.
D. They both suggest that snakes evolved from geckos.

Question

Scientists have observed that pythons have vestigial leg bones. They have also observed that snakes in general have more DNA sequences in common with four-legged geckos than they do with legless eels. What do these two observations have in common? 

A. They both suggest that geckos evolved from snakes.
B. They both suggest that pythons are more primitive than other snakes.
C. They both suggest that snakes evolved from an ancestor with legs.
D. They both suggest that snakes evolved from geckos.

anonymous · Answer

C. 

The first observation makes no reference to geckos, however both observations make references to ancestors with legs.