Whales are thought to have evolved from land animals similar to large otters. As evidence of this, whales have useless leg bones (structure C) that float inside their bodies. These leg bones are ___________ structures.

Question

Responses
A vestigialvestigial
B homologoushomologous
C analagousanalagous
D evolutionary

Answer 1

The correct answer is A vestigial. Vestigial structures are body parts that have lost their original function through the course of evolution. In the case of whales, the useless leg bones are remnants from their land-dwelling ancestors.