Biology Topics — QCE
QCE Biology Units 3 & 4 spans four topics across two units, from biodiversity and ecosystem dynamics in Unit 3 to DNA, inheritance, and evolution in Unit 4. External assessment contributes to your ATAR score.
Browse free flashcards and quizzes for each topic below, aligned to the QCAA Senior Syllabus. Active recall — testing yourself with flashcards rather than re-reading — is widely regarded as one of the most effective study techniques.
All Biology Units
Unit 3 Topic 1: Describing Biodiversity Classification & biodiversity levels Unit 3 Topic 2: Ecosystem Dynamics Food webs, nutrient cycling & conservation Unit 4 Topic 1: DNA, Genes & Continuity DNA, protein synthesis & inheritance Unit 4 Topic 2: Continuity of Life on Earth Evolution, speciation & conservationFrequently Asked Questions
What topics are in QCE Biology Units 3 & 4?
Unit 3 covers Describing Biodiversity and Ecosystem Dynamics. Unit 4 covers DNA, Genes & Continuity of Life, and Continuity of Life on Earth (evolution and speciation). All contribute to your ATAR.
How should I revise for the QCE Biology external exam?
Focus on understanding ecological processes and genetic concepts. Use flashcards to test key terms, cycles, and processes. The QCE external exam tests both recall and application, so practise explaining concepts in your own words.
Are QCE Biology flashcards on Revizi free?
Yes. All QCE Biology flashcards and quizzes are free on Revizi, aligned to the QCAA Senior Syllabus. Upload your notes for custom revision cards.
Biology in other curricula
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Last updated: March 2026 · Content aligned to the QCAA Syllabus