BIO 123 Study Guide - Comprehensive Final Guide: Deuterostome, Paramecium, Blastula
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Term not used anymore, we use homology instead. Can be the result of analogy, parallel and convergent evolution. To distinguish homology and homoplasy = congruence - homologies tell parts of the same story. Every organism contains traces of its entire evolutionary history. A homology of a larger group that contains the group you"re studying. William of ockham - early 14th century. Not a scientific law, but a guide to choosing best explanations. All other things being equal, the simplest explanations is most likely to be correct. **the explanation with the fewest evolutionary steps is the simplest. Phylogenetics use ancestral and derived for character states not species. Linnaeus thought the differentia was most important. Nomenclature: a system of names, or rules for maintaining a sytem of names. The sexual system: scandalous at the time. Ex - library of congress classification of books. Natural classification: exists in nature, independent of human thought. Monophyletic group: common ancestor and all of its descendants.
