Biology study guides

14 harder, exam-style QCE Biology Units 3 and 4 multiple-choice questions: Simpson's diversity index, the Lincoln index, energy transfer, selection types, allele frequencies, test crosses, blood groups, epigenetics, gel results, succession, sampling and cladograms. Each is tagged with its question type and every distractor explained. Original practice questions.

How the QCAA Biology external assessment awards marks, using the 2024 marking guide and subject report: calculations with working, inferring and justifying from data, explaining a process step by step, and describing a method. Practice questions, mark-by-mark breakdowns, our own full-mark sample answers, common errors and a self-marking AI prompt.

Deep-dive on QCE Biology Unit 1. Cell theory and cell types, organelles and the fluid mosaic membrane, transport across membranes, surface area to volume ratio, and the energy reactions of photosynthesis and respiration with worked examples.

Deep-dive on QCE Biology Unit 2. The negative feedback loop and its five components, nervous and endocrine control, thermoregulation, osmoregulation and the kidney, blood glucose control, and innate and adaptive immunity, with worked examples and a Check your knowledge section.

Deep-dive on QCE Biology Unit 3. Abiotic and biotic factors, energy flow and the 10 per cent rule, gross and net primary productivity, measuring biodiversity, classification and keys, population ecology and ecosystem succession, with worked calculations and a Check your knowledge section.

Deep-dive on QCE Biology Unit 4. DNA structure and replication, gene expression, Mendelian and non-Mendelian inheritance with Punnett squares, mutations and variation, and natural selection and speciation, with worked genetics problems and a Check your knowledge section.