BIOL 1020 Lecture Notes - Convergent Evolution, Ingroups And Outgroups, Multiple Choice
Document Summary
90 minutes : 60 minutes worth of content. 50 points: multiple choice, short answer, short paragraph. Iclicker quiz and questions: not for grades: two sessions january 31st at 5 in pe264, february 1st at 2 pm pe264, sessions are identical. Many trees that are similar with a few different branches. Trees are always updated: parsimony, tree construction is based on two main concepts. Principle of parsimony: assumption that evolution proceeds by a smaller rather than a larger number of events, note that other assumptions are possible for tree-building (maximum likelihood) Shared, derived homologies: carry information for designing trees. They are important because they are branching points. What is derived and what is ancestral is perspective (hair on mammals) Such traits called analogous structures or homoplasies are not useful in creating evolutionary trees (they don"t help because they aren"t ancestral: distinguish homology or anology: fossil evidence (did the structures arise independently in different ancestors: analogy: yes,
