If you do not teach Biology, what should I do?

Take Biology at school and use Educatta for your other ATAR subjects. The Educatta Human Biology program shares much of the genetics, evolution and immunity content.

What is the prac and fieldwork load like?

Practical work is around 20 to 25 percent of school-assessed marks: lab experiments, fieldwork including ecological surveys and dichotomous keys, and written investigations. Strong students treat the prac component as core, not an add-on.

Biology ATAR · Course Info

SCSA Curriculum

What Biology students actually study.

SCSA's Biology course breaks into four units across Year 11 and Year 12. It's broader than Human Biology: where Human Bio drills into one species (us), Biology covers ecosystems, plants, animals, microorganisms, and how all of it adapts to a changing planet. Below, what each unit covers and how it's assessed.

Unit 1

Ecosystems and biodiversity

How energy and matter move through ecosystems, and why biodiversity matters.

Energy and matter in ecosystems

Food webs, trophic levels, biogeochemical cycles (carbon, nitrogen, water).

Population dynamics

Population growth models, limiting factors, succession, and sampling techniques.

Biodiversity and classification

Taxonomy, dichotomous keys, and the case for biodiversity in conservation biology.

Assessment: School-assessed: investigations, fieldwork, tests, and an end-of-unit exam.

Unit 2

From single cells to multicellular organisms

Cells, plant systems, and animal systems compared side-by-side.

Cellular processes

Diffusion, osmosis, active transport, and the surface-area-to-volume problem.

Plant systems

Gas exchange, transport (xylem and phloem), and reproduction in flowering plants.

Animal systems

Digestion, gas exchange, transport and reproduction across diverse animal groups.

Assessment: Tests, lab pracs, and the mid-year exam.

Unit 3

Continuity of life

ATAR-scored. DNA, inheritance, and how species change over time.

DNA and gene expression

DNA replication, transcription, translation, and the molecular basis of mutation.

Inheritance and variation

Mendelian genetics, sex linkage, pedigrees, and sources of genetic variation.

Evolution and biotechnology

Natural selection, speciation, evidence for evolution, plus modern biotech tools.

Assessment: 50% school-assessed: investigations, tests, and an internal exam.

Unit 4

Surviving in a changing environment

External exam prep. Homeostasis, disease, and ecological response to change.

Homeostasis

Water balance, thermoregulation, and feedback loops in plants and animals.

Disease and immunity

Pathogens, transmission, and how plant and animal immune systems fight infection.

Climate change and ecosystems

Population responses to environmental change, extinction risk, and conservation.

Assessment: External exam, 3 hours, with multiple-choice, short-answer and extended-response sections.

ATAR exam structure

How the Year 12 exam is laid out.

SCSA's Biology ATAR external exam runs for three hours plus ten minutes reading time, sampling content across Unit 3 and Unit 4. School-assessed marks count for 50% of your final ATAR score; the external exam counts for the other 50%. The paper has three sections, each rewarding a different skill.

Section 1

Multiple choice

Recall, vocabulary, and quick application items.

Format

30 multiple-choice questions across both units, with around 40 minutes of suggested working time.

Weight

Approximately 30% of the exam.

What's tested

Definitions, taxonomy, ecological terminology, structure-function relationships and quick interpretations of small data tables or diagrams.

Strategy: Don't linger. Mark and move. Distractors are usually one biological term off, so a clean recall of the textbook definition is enough.

Section 2

Short answer

Multi-part questions that scaffold from describe to apply to evaluate.

Format

Six to ten short-answer questions, each in parts of increasing difficulty (1–2 marks at the front, 6–8 at the back).

Weight

Around 50% of the exam, the largest section by marks.

What's tested

Process recall (DNA replication, immune response, homeostatic feedback), data interpretation (graphs, ecological survey results, pedigree charts), and applied scientific reasoning.

Strategy: Watch for the directive verb. "Describe" lists features. "Explain" requires causation. "Account for" demands a mechanism with a why.

Section 3

Extended answer

Two questions, one each from Unit 3 and Unit 4 (with a choice).

Format

One extended-answer question selected from a choice of two for Unit 3, and one selected from a choice of two for Unit 4.

Weight

Roughly 20% of the exam.

What's tested

Sustained explanation that integrates content with examples. Strong responses define key terms, walk through the mechanism, link cause to effect, and finish with an evaluation or evidence-based conclusion.

Equipment: Black or blue pen, pencil for diagrams, ruler, sharpener and eraser. No calculator is required for Biology. No formula sheet is supplied.

What examiners reward

Common student mistakes in Biology.

SCSA's annual examination reports flag the same patterns year after year. The strongest Biology candidates aren't the ones who memorise the most textbook pages, they're the ones who use precise terminology, name the mechanism, and answer the directive the question is actually asking for.

Vague or borrowed terminology

Writing "the body sends a signal" instead of naming the hormone. Writing "the cell does work" instead of naming the organelle. Examiner reports note that imprecise wording is the single fastest way to lose easy marks. Use the SCSA glossary terms verbatim where you can.

Describing without explaining

Listing features when the question asks for a mechanism. If the question says "explain how" or "account for," every step needs a "because…". Description gets you partial marks; explanation closes the gap to full marks.

Genetics shortcuts

Skipping the parental cross, leaving out gamete generation, or assuming sex linkage without justifying it. Pedigree and Punnett square questions reward students who show every step, even when it feels obvious. The marking key has marks for the working, not just the answer.

Misreading data questions

Confusing axes, ignoring units, or quoting the trend without quoting a number to back it up. The marking key wants a reference to specific data points. "The line goes up" is not enough; "between 2010 and 2020 the population doubled from 200 to 400" is.

Extended-answer essays with no plan

Two minutes of planning beats five extra minutes of writing. Write a 4-bullet skeleton: define, mechanism, example, evaluation. Examiner reports consistently note that structure separates the 70th from the 90th percentile.

Treating Biology as memorisation

There's a lot of content, but the exam tests reasoning. Build flashcards for processes (transcription, action potential, succession), then practise applying them to unfamiliar scenarios. Past papers are non-negotiable in the final 6–8 weeks.

Career & uni pathways

Where Biology leads in WA.

Biology is a List B course (sciences). It satisfies the science prerequisite at every WA university and opens doors into ecology, agriculture, marine biology, conservation, biotech and the broader life-science pipeline. It's not the dominant choice for medicine (Chemistry plays that role) but it's a strong fit for a wider range of degrees than most students realise.

UWA

Conservation, Marine Science, Agriculture

UWA's Bachelor of Science majors in Conservation Biology, Marine Science, Plant Biology, Genetics and Agricultural Science all build directly on ATAR Biology. The Bachelor of Biomedicine accepts Biology as a science prerequisite. UWA's strong research base makes it the leading WA option for ecology and marine pathways.

Curtin

Environmental, Molecular & Health Sciences

Curtin runs Bachelor of Science majors in Molecular Genetics, Microbiology, Environmental Biology and Medical Sciences. Most accept ATAR Biology as the satisfying science. Curtin's Health Sciences faculty also draws on Biology graduates into nursing, OT and pharmacy pathways.

Murdoch & ECU

Veterinary, Forensic, Conservation

Murdoch is the only WA university offering Veterinary Science (Biology is recommended, Chemistry strongly recommended). Murdoch and ECU both run forensic biology, conservation and wildlife biology degrees that count Biology among their preferred Year 12 subjects. Notre Dame offers biomedical and health-science pathways too.

Beyond uni

Where Biology grads end up

Conservation officer, ecological consultant, marine scientist, agricultural researcher, biotech technician, science communicator, secondary teacher, environmental policy advisor. WA's mining, agriculture and fisheries sectors all employ life-science graduates. Biology is also a common stepping-stone into postgraduate medicine via UWA's Doctor of Medicine assured pathway, when paired with strong Chemistry.

Want to model how Biology might affect your ATAR? Use our free ATAR calculator, or read how WACE scaling actually works.

Common questions

Biology FAQs.

Does Educatta teach Biology?

Not currently. We focus on the six core ATAR subjects most students sit: Maths Methods, Maths Applications, English, Chemistry, Physics and Human Biology. Biology has a smaller WA cohort than Human Biology, so we've prioritised the latter for now. Email us if you'd like us to track your interest in Biology.

What's the difference between Biology and Human Biology?

Biology is broader: it covers ecosystems, plants, animals, microorganisms, evolution, and how living systems respond to environmental change. Human Biology is narrower and deeper on one species (us): body systems, genetics, infectious disease, and lifespan biology. If you love ecology, plant science, or environmental work, Biology fits better. If you're medicine, nursing or biomedical bound, Human Biology is the more useful pick.

Can I do both Biology and Human Biology?

Yes, SCSA allows it, and a small number of WA students do. The content overlap is significant (genetics, evolution, cell biology) so you'll repeat some material, but you'll also have two science scores and double the science depth. Most students who do both are biology-mad and uni-bound for ecology, marine biology, agriculture, or biomedical research. If you're picking one, choose based on uni path, not just interest.

Does Biology scale well?

Biology scales similarly to Human Biology: roughly neutral, give or take a couple of points depending on the year. Like all sciences, the scaling barely matters compared to where you sit in the cohort. A 75 raw in Biology after light scaling will outperform a 60 raw in Chemistry after a positive scaling boost. Pick the science you can score well in.

If you don't teach Biology, what should I do?

If your school offers Biology and you love it, take it there and use Educatta for your other ATAR subjects. If you're choosing between Biology and Human Biology, our Human Biology program covers a lot of the shared content (genetics, evolution, immunity), so trialling that is a good way to check whether a Biology-style subject works for you. Sit a free trial and we'll give you a straight read.

How is the Biology external exam structured?

Three sections across three hours plus 10 minutes reading time: 30 multiple-choice questions (around 30% of marks), short answer (the largest section, around 50%), and extended answer with one Unit 3 question and one Unit 4 question chosen from a pair (around 20%). No calculator and no formula sheet are required. School-assessed work counts for 50% of your final ATAR mark; the external exam counts for the other 50%.

Do I need Year 11 Biology to take Year 12 Biology?

Most schools require it. Year 11 Biology builds the ecological and cellular foundations (food webs, classification, cell processes, plant and animal systems) that Year 12 builds on. A few strong students transfer in from Human Biology, but they need to catch up on plant systems and ecology, which Human Bio doesn't cover.

What's the prac and fieldwork load like?

Practical work is around 20–25% of school-assessed marks: lab experiments, fieldwork (ecological surveys, dichotomous keys), and written investigations. Strong students treat the prac component as core, not an add-on. Examiner reports consistently flag scientific method and data analysis as separators between mid-pack and top-end candidates.

How much study do top Biology students do?

The top scorers report two patterns: weekly active recall on flashcards (taxonomy, biochemical pathways, key processes), and timed past-paper practice from August onwards. SCSA publishes recent past papers and marking keys on the Biology past exams page. Use them as the primary study tool, not the textbook.

Biology ATAR in Perth

What Biology students actually study.

How the Year 12 exam is laid out.

Common student mistakes in Biology.

Where Biology leads in WA.

Biology FAQs.

Try a free Human Biology class.