Analogus and Homologus Features
Storyboard Text
- Wow, even though birds and butterflies look really different, they both fly. They must be related.
- Actually, birds and butterflies have no common ancestor. Birds have evolved from dinosaurs and butterflies from an ancient fly.
- The fact that they both evolved to fly is just because their environments required the ability to fly because it would be more beneficial.
- The wings of both species are analogous features. Features that have a similar function, but don't have any evolutionary relation. They also don't have similar structures.
- You might find this hard to believe, but we are actually related to birds through a common ancestor that lived millions of years ago.
- Becuase of our relation, bird wings and human arms are structurally similar. These are called homologous features. Similar evolution and structure, but different function.
- So if birds are related to dinosaurs and we are related to birds, does that mean I am related to dinosaurs?
- Well... that's not exactly how it works.
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