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Preliminary Biology

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3 | Life on earth

4: The study of present-day organisms increases our understanding of past organisms and environments

Lesson 1 | Why classify?

  • Explain the need for scientists to classify organisms

  • Describe the selection criteria used in different classification systems and discuss the advantages and disadvantages of each system

  • Explain how levels of organisation in a hierarchical system assist classification

  • Describe the main features of the binomial system in naming organisms and relate these to the concepts of genus and species

Lesson 2 | Changes in classification system

  • Describe the selection criteria used in different classification systems and discuss the advantages and disadvantages of each system

  • Discuss using examples, the impact of changes in technology on the development and revision of biological classification systems

Lesson 3 | Dichotomous keys

  • Perform a first-hand investigation and gather information to construct and use simple dichotomous keys and show how that can be used to identify a range of plants and animals using live and preserved specimens, photographs or diagrams of plants and animals

Lesson 4 | Classifying present and past life

  • Identify and discuss the difficulties experienced in classifying extinct organisms

  • Explain how classification of organisms can assist in developing an understanding of present and past life on Earth

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  • HSCStudy Lab Lessons

    61 Lessons

    Lessons by expert teachers that cover the NSW Preliminary Biology Syllabus comprehensively.

  • HSCStudy Lab Quizzes

    61 Practice questions

    61 lesson quizzes that include a variety of question types. This course also includes 20 focus level and 4 module level tests, as well as a comprehensive end of course practice exam.

  • HSCStudy Lab videos

    61 Hours of video

    Videos that fully explain complex biology questions through animation, practical experiments, and tutorials.

  • HSCStudy Lab interactives

    26 Interactive activities

    Interactive activities that help you explore and understand key syllabus dot point as well as additional resources such as an interactive Periodic Table.

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