Question

structures derived from a common ancestor found in different species and are similar in structure but not function

Answer 1

The structures you are referring to are known as **homologous structures**. These are anatomical features in different species that share a similar origin or developmental pathway, stemming from a common ancestor, but may serve different functions in the respective species. For example, the forelimbs of mammals (like humans, whales, and bats) exhibit similar bone structures (humerus, radius, and ulna), though they are adapted for different functions such as grasping, swimming, and flying. This similarity in structure despite differing functions is a key piece of evidence for the theory of evolution.