Biology (5090) Topic 2 · Classification 2.1 Concept and use of a classification system Practise grouping organisms by shared features, defining species, using binomial names, and constructing and using dichotomous keys. Key TheoryLearn FirstLoading… Common MistakesAvoid TheseLoading… StrategyApply ThisLoading… Practice 1EasyLoading… Practice 2EasyLoading… Practice 3MediumLoading… Practice 4MediumLoading… Practice 5AdvancedLoading…