Chapter 2 & 16

Question 1

Willi Hennig

Answer 1

invented “cladistics” ( = phylogenetic systematics)

Question 2

Clade

Answer 2

monophylogenetic group

Question 3

Nodes represent ______

Answer 3

• speciation event
• show split & dissapearance of an ancestral species and formation of 2 D. Spp.
• result in clade

Question 4

Phylogenies Based on Analysis of Traits

Answer 4

• today’s include morphological & molecular ( nucleotide base sequences) traits.

Question 5

Phylogeny

Answer 5

Hypothesis that changes as new information becomes available … “work in progress”