Question

question 7
which of the following is an example of homologous structures?
the tailbone of a human.
the pelvic bones in a whale or snake the no longer have hind limbs.
the structural similarities in the forelimbs of species that share a common ancestor.
the structural changes in the jaws of animals as a result of available food sources.

Explanation:

Homologous structures are anatomical features in different species that are similar in structure due to shared ancestry, even if their functions differ. The tailbone of a human and pelvic bones in whales/snakes are vestigial structures (remnants of once - functional structures). Structural changes in jaws due to food sources are adaptations. The structural similarities in the forelimbs of species with a common ancestor are homologous as they share a common evolutionary origin.

Answer:

The structural similarities in the forelimbs of species that share a common ancestor.