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TAS · Year 12
01-TAS · Biology
Tasmanian Certificate of Education · TASC· 2026

TCE Biology (Tasmania): complete 2026 guide to the pre-tertiary Units 3 and 4

Study-note hub for TASC pre-tertiary Level 3/4 Biology in Tasmania, covering Unit 3 Heredity and Continuity of Life and Unit 4 Change Over Time, with dot-point notes, worked examples and exam tips.

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TCE Biology (Tasmania): Level 3/4 study notes

Welcome to the ExamExplained hub for Tasmanian TCE pre-tertiary Biology. This course is accredited by TASC and follows the Australian Curriculum senior Biology structure. These notes break the syllabus into focused dot points so you can revise one idea at a time.

Unit 3: Heredity and Continuity of Life

Unit 3 looks at how genetic information is stored, expressed and passed between generations, and at how that knowledge is applied through biotechnology.

  • DNA and gene expression
  • Inheritance and variation
  • Cell division: mitosis and meiosis
  • Biotechnology

Unit 4: Change Over Time

Unit 4 explains how populations and species change across generations, the evidence that supports evolution, and how new species form.

  • Natural selection and adaptation
  • Evidence for evolution
  • Speciation
  • Population genetics

Assessment overview

The TASC pre-tertiary Biology course is assessed through two complementary components. School-based internal assessment runs throughout the year, with your teacher rating your performance against the published TASC criteria using practical investigations, tests and reports. At the end of the course you sit a single TASC external examination that is common to all Tasmanian candidates. The combined result is reported on your Tasmanian Certificate of Education and contributes to your ATAR, so steady internal performance and strong exam technique both matter.

How to study with these notes

Start with the TL;DR in each dot-point file for a fast, accurate answer, then work through the detailed explanation, the worked example and the common-mistake call-out. Pair the notes with past TASC papers, your own practical data and active recall to lock in the concepts before assessment.

04-The TCE system
generalAI and academic integrity in 2026: what you can and cannot doAn honest 2026 guide to how Year 12 students can use AI tools well and where the line is. NESA, VCAA, and QCAA rules, what AI is actually good at, what it is bad at, and how to think about it without panicking.wellbeingExam stress, anxiety, and looking after yourselfAn honest guide to exam stress and mental health in Year 12. What is normal, what is not, when to ask for help, and what to do if it gets really hard. With the numbers you can call.uni pathwaysGap year or uni straight after school?A clear-eyed comparison of going straight to uni versus taking a gap year. Who benefits from each, how to actually defer your offer, common gap-year traps, and how to make either path work for you.generalHow ExamExplained is built: the AI-first methodology (2026)How ExamExplained is built. Claude Opus (Anthropic's latest AI) reads the published syllabuses, past papers and marking guides from the official exam authorities, then writes the dot-point answers, guides and quizzes. AI-written, not individually human-reviewed, so always check the official authority for what affects your mark.uni pathwaysHow to choose a uni course (without picking the wrong one)A practical guide to picking your university course in Year 12. How to research, how to order preferences, when to ignore the ATAR cutoff, and how to leave yourself an escape hatch if you change your mind.
05-Common questions
What is TCE pre-tertiary Biology in Tasmania?
It is the Level 3/4 senior Biology course accredited by TASC (the Office of Tasmanian Assessment, Standards and Certification). It follows the Australian Curriculum senior Biology structure and contributes to the Tasmanian Certificate of Education and your ATAR.
How is the course assessed?
Assessment combines school-based internal assessment of criteria across the year with a single TASC external examination at the end of the course. Both components are reported, and the result counts towards your ATAR.
Which units are studied at Level 3/4?
The pre-tertiary course covers four units. These notes focus on Unit 3 Heredity and Continuity of Life and Unit 4 Change Over Time, which deal with genetics, cell division, biotechnology, natural selection, evidence for evolution, speciation and population genetics.
What is the difference between internal and external assessment?
Internal assessment is conducted and marked by your school against TASC criteria using tasks such as practical reports, tests and investigations. The external examination is set and marked by TASC and is common to all candidates across Tasmania.
Do these notes match the official course?
They are organised around the Australian Curriculum senior Biology concepts that the TASC course follows. Always check the current TASC course document and your teacher's task sheets for exact wording and weightings, as these can change between years.
How should I use these dot-point notes?
Use each dot-point file to get a quick TL;DR answer, then read the fuller explanation, worked examples and common-mistake notes. Combine them with past papers and your own practical work to prepare for both internal tasks and the external exam.
What's the difference between mitosis and meiosis?
Mitosis produces two identical diploid cells (for growth and repair). Meiosis produces four genetically distinct haploid cells (for sexual reproduction).
How does protein synthesis work?
Transcription (DNA → mRNA in the nucleus) then translation (mRNA → polypeptide at the ribosome). tRNA brings amino acids that the ribosome links into the protein sequence the mRNA codes for.
What's homeostasis?
The maintenance of a stable internal environment (temperature, blood glucose, pH) despite external change — usually via negative feedback loops involving receptors, control centres, and effectors.
How does evolution by natural selection work?
Variation exists in a population → some variants survive and reproduce better in a given environment → those traits become more common over generations. Requires heritable variation, differential reproductive success, and time.
What's the difference between an antibody and an antigen?
Antigen: a molecule (often on a pathogen) that triggers an immune response. Antibody: a Y-shaped protein the immune system makes to bind specifically to that antigen.

Openly AI-built from the official TASCsyllabuses, past papers and marking guides. Not individually reviewed; always check your school's materials and TASC for current rules.

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