The scales of reptiles and the feathers of birds are considered to be homologous structures because they A - VCE - SSCE Biology - Question 24 - 2002 - Paper 1

Homologous structures are those that share a common ancestral origin, even if they have evolved different functions over time. In this case, the scales of reptiles and the feathers of birds have evolved from the same ancestral structure. This is indicative of their evolutionary relationship, highlighting how different species can diverge from a common ancestor while developing distinct adaptations.