Question

multiple choice 1 point
one example of a piece of evidence for evolution is the presence of vestigial structures. which of these is an example of a vestigial
structure?
in humans, the appendix is shrunken and no longer necessary for survival.
humans, penguins, and crocodiles all have a humerus bone in their arm.
peacocks will grow large and bright feathers to attract mates.
the dna of humans and primates is very similar.
previous

Explanation:

Vestigial structures are remnants of organs or structures that had a function in an early ancestor. The appendix in humans is a classic example. It is shrunken and no longer necessary for survival, which fits the definition of a vestigial structure. The other options are examples of homologous structures (humans, penguins, and crocodiles having a humerus bone) or behaviors (peacocks growing feathers to attract mates) or genetic similarities (DNA of humans and primates being similar), not vestigial structures.

Answer:

In humans, the appendix is shrunken and no longer necessary for survival.