Per+3+Group+2

Idea's for presentation of Homologous structures and Vestigial structures posted by Chiamaka

Possible ideas for presentation of Homologous and Vestigial structures Homologous structures...(arms)...Africa…skit...one ancestor…2 current mammals...maybe humans and horses... Vestigial structures…get an ancestor that looks like a chimpanzee…the tail…talk about how humans also have tail bones where a tail used to be for balance?...however it no longer became any use to humans and over time it started to diminish in size. This speaks directly to natural selection because it shows that the individuals that are able to survive and reproduce are the ones that no longer spent energy trying to maintain a structure that no longer functioned as a necessary use for humans.