BIS 2C Lecture Notes - Lecture 5: Herbivore, Body Plan, Gigantism
10 Aug 2018
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Studying the tempo & mode of evolution. How/when/at what rate do characters (morphological, ecological) change. Using phylogenetic criteria to establish conversation priorities. By targeting both, one captures deeper history. Preserve the greatest diversity of lineages (set of species that best captures the evolutionary history of group) instead of as many species as possible. Many applications ask where an event occured. Using characters to build a tree - often using dna. Outcrossing: ability to mate with others - most of leptosiphon species are outcrossing. Can always reproduce, do not need a different mate. Build a tree based on dna sequence comparisons. Cannot build a tree using characters that you are trying to use to prove a point. Because there is a particular body form associated with selfing. No one realized it was 3 species. Self-compatible forms all have the same species name because taxonomists mistook them for a single species; they independently evolved.
