Phylogeny & Courtship Behaviour

How scientists classify species based on evolutionary relationships

1. Shows us evolutionary history of different species
2. Branching points that represent common ancestors
3. Horizontal distances show rate of genetic change (evolutionary time)

1. continous classification system (doesnt force species into rigid taxonmic groups)
2. No overlaps between categories

Form of classifciation that relies heavily on physical traits

Just using physcial traits can be misleading

Features which evolved due to animals living in similar environments (not from a common ancestor)

1. Molecular comparisons
2. Embryology
3. Comparative anatomy
4. Behavioural studies

Where you look at similarities of DNA and protien sequences to find how closely related some species are

Looking at similarities in developmental patterns from an organism developing from a fertilised egg for classification

Comparing physical characteristics of living species to extinct species in fossils and tracing changes over time

Looking at how species interact

-Allows animials to recognise memebers of their own species
-Helps coordianate the timing of mating