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📚 Subject: QCE Biology Unit 3
Biodiversity & Ecosystems
Biodiversity refers to the variety of all organisms in a region. High-biodiversity ecosystems are more resilient and stable. Australia's rainforests, coral reefs, and mangrove forests are megadiverse regions.
Key concept: Energy Flow
Energy flows from the sun → producers (plants) → consumers (animals). Approximately 10% of energy is transferred to each trophic level. This is the 10% rule.
Flashcard 1 of 12
Q: Define biodiversity
A: The variety and variability of all organisms, ecosystems, and genetic diversity in a region or on Earth.
Flashcard 2 of 12
Q: What is the 10% rule?
A: Only approximately 10% of energy is transferred from one trophic level to the next, with the rest lost as heat.
Question 1 of 8
Which ecosystem has the highest biodiversity in Australia?
A) Desert
B) Coral reefs and rainforests ✓
C) Grasslands
D) Temperate forest
Practice Exam - Question 1
Explain how high biodiversity increases ecosystem resilience. Use the example of a rainforest. (4 marks)
Step-by-step marking included when you submit!
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🚀

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High School Mode
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Feature Revaix Study ChatGPT Quizlet Generic AI
Syllabus-matched for QCE/VCE/HSC ✓ ✗ ✗ ✗
No upload needed (pick course instead) ✓ ✗ ✗ ✗
Auto-marks exam step by step ✓ Manual ✗ Manual
Marks assignments with rubric ✓ Manual ✗ ✗
Interactive flashcards from notes ✓ ✗ ✓ ✗
MCQs with live scoring ✓ Manual ✓ Manual
Formula breakdowns with notation ✓ Manual ✗ ✗
Free to start ✓ ✓ Limited ✓
Australian made & owned ✓ ✗ ✗ ✗
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FAQ

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Do I need to create an account?
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No — go to revaixstudy.com/app and start immediately. No signup, no email, no credit card needed. The free tier gives you 3 uploads to try everything.
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+
Yes. In High School mode, select your state, subject, and unit. The AI generates content specifically aligned to that syllabus using the correct command verbs, assessment objectives, and question styles from your state's external exams. It's trained on official QCAA, VCAA, and NESA materials.
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+
No — for both high school and university students, you can just enter your course details and Revaix generates everything from that. Upload your own notes if you want hyper-personalised content, but it's completely optional.
What file types can I upload?
+
PDF, JPG, and PNG are supported. Best results with 1–15 pages. Very large PDFs may take longer to process. Word and PowerPoint files need to be saved as PDF first.
How does the assignment marking work?
+
Upload your completed assignment as a PDF or image. You can also upload your rubric or marking criteria for more accurate feedback. The AI reads your work and gives paragraph-by-paragraph feedback, an overall grade, and criteria scores. It mirrors how your teacher would mark it.
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Your uploaded files are sent to Anthropic's Claude API to generate study content and are not stored on our servers. We don't keep your documents after processing. Your data is never sold or used to train models. Data security is a priority—read our privacy policy for full details.
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+
Free to start with 3 uploads. The Student plan is $7/month for 20 uploads per month, and the Serious Student plan is $14/month for unlimited uploads.
What's the difference between Student and Serious Student?
+
Student gets 20 uploads per month—perfect for weekly studying. Serious Student gets unlimited uploads plus priority processing, saved study packs, an AI study chatbot, and deeper notes. If you're using it multiple times per week, Serious is better value.
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+
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