10.2 - Phylogeny Flashcards
Courtship behaviours Using phylogenetics to study evolutionary histories Limitations of classification and evidence for phylogeny
What are courtship behaviours?
Species-specific displays and signals to attract mates
What are 3 benefits of courtship behaviours?
- It enables recognition of same species, leading to successful mating, production of fertile offspring, and raising of offspring.
- It prevents wasteful interspecies breeding.
- It maximises chances of successful reproduction, like in species where females only produce egg cells at specific times to determine if the female is at the receptive stage for mating.
What is phylogeny?
Evolutionary relationships between organisms
What is phylogenetic classification?
Classifying species into groups based on evolutionary relationships
What are the advantages of phylogenetic classification?
Continuous tree
What do phylogenetic trees show?
Evolutionary relationships and histories
What does the position of branching points on a phylogenetic tree indicate?
Distance of shared common ancestors
What does the distance between vertical lines on a phylogenetic tree indicate?
Closeness of species’ evolution
What does the proximity of species on a phylogenetic tree indicate?
Closeness of evolutionary relationship
What is artificial classification?
Grouping organisms based on useful differences
What are some examples of features used in artificial classification?
Colour
What evidence is used to determine phylogeny?
Molecular comparisons
