Question

11.4 give one example of a homologous trait and one example of a vestigial trait, and explain how such traits support the theory of common descent. the chapter story outlined the careful and painstaking research engaged in by paleontologists including j. g. m. “hans” thewissen. much of the evidence that was important to unraveling the relationships of whales and their relatives relies on understanding the importance of adaptive traits. based in large part on this evidence, an extinct animal called indohyus is recognized as the oldest whale relative and is known to share several adaptive traits with other aquatic organisms. which statement accurately describes an adaptive trait of indohyus? indohyus had crushing basins in its molars, similar to those of modern aquatic plant eaters. indohyus left fossilized adult and juvenile footprints that showed a change in parental behavior. indohyus had long hair to keep it warm in cold polar oceans. indohyus had no ear bones because it is silent under water. indohyus had thin bones with large spaces that allowed it to float.

Explanation:

Indohyus had crushing basins in its molars like modern aquatic plant - eaters, an adaptive trait for diet. Other options are incorrect facts.

Answer:

Indohyus had crushing basins in its molars, similar to those of modern aquatic plant eaters.