23.1

Question 1

systematics

Answer 1

the reconstruction and study of evolutionary relationships
-construct phylogenies to present hypotheses about relationships among species

Question 2

branching diagrams depict evolutionary relationships

Answer 2

phylogenies

Question 3

phylogenies are hypotheses based on the best available data

Answer 3

these data often come from multiple osurces
-molecular-DNA and protein sequences
-morphology
-physiology
-behavior

Question 4

outgroup

Answer 4

taxa that are closely related, but not direct members of the group being studied

Question 5

clade

Answer 5

contains species that share a common ancestor

Question 6

synapomorphy

Answer 6

derived character shared by clade members

Question 7

node

Answer 7

a point of divergence