Table 4 Unconventional features observed in phylogenetic trees constructed by students
From: Student construction of phylogenetic trees in an introductory biology course
| Feature | Group unit exam (n = 23) | Individual final exam (n = 77) | Group final exam (n = 22) |
|---|---|---|---|
| Variable orientation | 7 (30 %) | 15 (19 %) | 4 (18 %) |
| Taxa on branches | 3 (13 %) | 8 (10 %) | 2 (9 %) |
| Arrowhead branches | 1 (4 %) | 6 (8 %) | 0 (0 %) |
| Displaced outgroup | 2 (9 %) | 5 (6 %) | 1 (5 %) |