Question

the nonfunctional pelvis and hind limbs found in some snakes support which statement about evolutio
snakes evolved from the same common ancestor as species in which these structures are functional.
selection pressures promoting snake evolution ceased before snake anatomy was well adapted.
mutations tend to make species evolve to resemble other species in their environment.
snakes began to evolve these structures, but selection pressures did not favor them.

Explanation:

Vestigial structures, like the non - functional pelvis and hind limbs in some snakes, are remnants of structures that were functional in an ancestor. If snakes have these vestigial structures, it implies that they evolved from a common ancestor with species where these structures (pelvis and hind limbs) are functional. For example, many lizards have functional limbs and pelvis.

• The second option about selection pressures ceasing before adaptation is not supported. Vestigial structures are about evolutionary history (ancestry), not about when selection pressures stopped.
• The third option about mutations making species resemble others is incorrect. Vestigial structures are about homology (shared ancestry), not about convergent evolution (resembling due to similar environments).
• The fourth option is also incorrect. The presence of vestigial structures is best explained by common ancestry, not by starting to evolve a structure and then selection not favoring it (in a way that ignores the ancestral connection).

Answer:

Snakes evolved from the same common ancestor as species in which these structures are functional.