Lecture 6 - How do we classify life? Flashcards
Natural selection acts on the level of the ____
individual
Evolution acts on the level of the ____
population
Biological species is defined as
a group of individuals that can interbreed and produce fertile offspring
Linnaean Tax
K, P, C, O, F, G, S Kyle please come over for good sex
What is the problem with linnaean taxonomy>
It is based off of analogous structures but not everything that looks similar are related
Homologous structure
Common ancestor. Same structure not always the same function
Analogous
Look similar but are not from the same ancestor
Convergent evolution
Independent evolution of similar structures in groups who are not closely related
Synapomorphies
shared derived characteristics
Cladograms
Branching diagrams that show hierarchies of diagnostic characters. They depict hypothesis of how two organisms are related to each other
Cladograms represent ______ about evolutionary relationships
Hypotheses
Does calling a trait primitive or derived imply worse or better>
No
Plesiomorhpic
primitive
apomorphic
derived
