phylogenetic trees

Question 1

phylogeny

Answer 1

evolutionary history
- 1 common ancestor (~3-4 billion y.a.)
- every species = pattern of descent

Question 2

phylogenetic tree

Answer 2

visual evolutionary history
- complex
- exact timeline
- depicts processes of evolution/time

Question 3

cladogram

Answer 3

hypothetical picture of evolution
- lots of detail
- general relationships
- no exact timescale

Question 4

time on cladograms

Answer 4

• root of tree = ancestral lineage –>
• tip of tree = most recent

Question 5

mrca

Answer 5

most recent common ancestor
- 1st previous node

Question 6

extant

Answer 6

not extinct (alive)

Question 7

all traits listed below an individual =

Answer 7

traits of that individual

Question 8

clades

Answer 8

classifications/groupings w/ common ancestor and all descents of an ancestor
- circle group; only cross tree once