Question

Name Check Your Understanding 9.2 Date Section 1 Cladistics or Evolutionary taxonomy? (Put a C or ET in the blanks.) Which school of systematics emphasizes: amount of change (evolution) of groups since the shared common ancestor. b recency of divergence from the common ancestor; branching patterns. 2 What are two characteristics that are primitive for mammals but derived for vertebrates? (Vertebrate groups are: fish, amphibians, reptiles, birds, and mammals.) (Hint: These would be features that all mammals share, but that other vertebrates do not possess.) 3 In evolutionary taxonomy, relationships are graphically represented by a/an 4 In cladists, relationships are graphically represented by a/an 5 The term for any feature of an organism that is used as the basis for comparison in classification is a/an 6 What does a clade represent? 7 What is a node on a cladogram? Chapter 9 Biological Classification and the Order Primates 251

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