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?
Answer
They both suggest that geckos evolved from snakes.
They both suggest that pythons are more primitive than other snakes.
They both suggest that snakes evolved from an ancestor with legs.
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?
Answer
		They both suggest that geckos evolved from snakes.
		They both suggest that pythons are more primitive than other snakes.
		They both suggest that snakes evolved from an ancestor with legs.
		They both suggest that snakes evolved from geckos.

anonymous · Answer

The second one.

anonymous · Answer

Nope. The second observation is that snakes in general share more DNA sequences with four-legged geckos than with legless eels. Other snakes might have vestigial leg bones as well, and may even be older than pythons; this question doesn't really assume familiarity with herpetology, and so we can't make that claim (option B) based *solely* on what's offered. In addition, the qualities of "legless" and "legged" are not chronologically-separated evolutionary traits based on the information of the question; one doesn't necessarily always happen before the other.

We can therefore say that both observations indicate legged ancestors for pythons and other snakes. The pythons, eels, and geckos are just distractors in this word problem.

anonymous · Answer

In a more, simplified manner, the answer is C.) They both suggest that snakes evolved from an ancestor with legs. Nice answer @unexpectedeof