Scientists use the concept of homology to identify evolutionary relationships among organisms. Homologies are characters shared between different species that were also present in their common ancestor. Homologies can be structural, biochemical, developmental, physiological or behavioural. In this podcast, I focus on homologous structures and, in particular, the pentadactyl limb. This bony arrangement is thought to provide irrefutable evidence for evolution. (With thanks to our sponsor 'Curriculum Press' for providing content for this podcast)
