IB biology - A3.2 Classification and cladistics

Syllabus

Additional higher level

• A3.2.1 Need for classification of organisms
• A3.2.2 Difficulties classifying organisms into the traditional hierarchy of taxa
• A3.2.3 Advantages of classification corresponding to evolutionary relationships
• A3.2.4 Clades as groups of organisms with common ancestry and shared characteristics
• A3.2.5 Gradual accumulation of sequence differences as the basis for estimates of when clades diverged from a common ancestor
• A3.2.6 Base sequences of genes or amino acid sequences of proteins as the basis for constructing cladograms
• A3.2.7 Analyzing cladograms
• A3.2.8 Using cladistics to investigate whether the classification of groups corresponds to evolutionary relationships
• A3.2.9 Classification of all organisms into three domains using evidence from rRNA base sequences

Slides