Theory of Evolution — Grade 12 | Dr Tracey Classens Life Sciences 🦴 Grade 12 Life Sciences · IEB Theory ofEvolution From Darwin’s finches to DNA evidence — understanding how life on Earth changed over billions of years, and the mechanisms that drive that change. FundamentalsDarwin’s ObservationsNatural Selection EvidenceSources of VariationPatterns & Rates Artificial SelectionQuiz […]
Theory of Evolution — Grade 12 | Dr Tracey Classens Life Sciences 🦴 Grade 12 Life Sciences · IEB Theory ofEvolution From Darwin’s finches to DNA evidence — understanding how life on Earth changed over billions of years, and the mechanisms that drive that change. FundamentalsDarwin’s ObservationsNatural Selection EvidenceSources of VariationPatterns & Rates Artificial SelectionNew
Geological Timescale of Earth Geological Timescale of Earth 4,600 million years of history · 5 mass extinctions · The complete story of life on Earth All Eons 💥 Extinctions Only ⎙ Print / PDF Jump to: All Hadean Archean Proterozoic Paleozoic Mesozoic Cenozoic 💥 Extinctions Eon Era Period Epoch Age (Ma ago) Duration Key Life
Past Paper Question Bank | Dr Tracey Classens Life Sciences 📚 IEB-Style Question Bank · Grade 11 & 12 · CAPS & IEB Past Paper Question Bank IEB-style exam questions with full marking memos. Filter by topic, grade, curriculum and difficulty. Each question includes MCQ practice and a detailed memo reveal. 🎯 MCQ + Full
The Scientific Method | Dr Tracey Classens Life Sciences 🔬 Grade 11 & 12 · CAPS & IEB · All Papers The Scientific Method The framework behind every experiment, every practical, and every data-response question. Master this and you gain marks across every single topic in Life Sciences. 🎯 Easy marks most students drop 📋
Human Circulatory System | Dr Tracey Classens Life Sciences ❤️ Grade 11 Life Sciences · CAPS & IEB The HumanCirculatory System A closed double circuit — pumping blood through 100 000 km of vessels every minute, delivering oxygen to every cell and removing waste products from the body. 🔴 Oxygenated = red 🔵 Deoxygenated =
Supporting Systems & Movement in Animals | Dr Tracey Classens Life Sciences 🦴 Grade 11 Life Sciences · CAPS & IEB Supporting Systems &Movement in Animals Skeletons, joints, bones, muscles and locomotion — how the human body is built for support and movement, and what goes wrong when things break down. 🦴 Skeleton types 🔩
Support & Transport in Plants | Dr Tracey Classens Life Sciences 🌿 Grade 11 Life Sciences · CAPS & IEB Support & Transportin Plants From roots to leaves — how dicotyledonous plants absorb water, transport minerals, move food, and control water loss through transpiration. 💧 Xylem — water up 🍃 Phloem — food both ways
Cellular Respiration — The Power Station | Dr Tracey Classens Life Sciences ⚡ Grade 11 Life Sciences · CAPS & IEB Cellular Respiration:The Power Station Every cell in your body is a tiny power station — breaking down glucose to release energy in the form of ATP. No ATP = no life. Here’s how the
Photosynthesis — The Solar Factory | Dr Tracey Classens Life Sciences ☀️ Grade 11 Life Sciences · CAPS & IEB Photosynthesis:The Solar Factory Plants are nature’s solar panels — capturing light energy and converting it into chemical energy stored in glucose. Here’s how the factory works. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂ ☀️ Light
