5.4 - Cladistics
Assessment statements
| DCS Topic Code | Statement | Guidance |
| 5.4.U1 | A clade is a group of organisms that have evolved from a common ancestor. | |
| 5.4.U2 | Evidence for which species are part of a clade can be obtained from the base sequences of a gene or the corresponding amino acid sequence of a protein. | |
| 5.4.U3 | Sequence differences accumulate gradually so there is a positive correlation between the number of differences between two species and the time since they diverged from a common ancestor. | |
| 5.4.U4 | Traits can be analogous or homologous. | |
| 5.4.U5 | Cladograms are tree diagrams that show the most probable sequence of divergence in clades. | |
| 5.4.U6 | Evidence from cladistics has shown that classifications of some groups based on structure did not correspond with the evolutionary origins of a group or species. | |
| 5.4.A1 | Cladograms including humans and other primates. | |
| 5.4.A2 | Reclassification of the figwort family using evidence from cladistics. | |
| 5.4.S1 | Analysis of cladograms to deduce evolutionary relationships. |
Notes
| 5.4_notes.pdf |
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