Life Sciences — Grade 11

Biodiversity and Classification of Microorganisms

Microorganisms are tiny living things that you cannot see without a microscope. Even though they are invisible, they are everywhere—in soil, water, air, and even inside your body. Some cause diseases like TB and malaria. Others help us digest food, make bread rise, or keep ecosystems healthy.

Biodiversity of Plants

Plants are everywhere—from mosses on wet rocks to giant trees in forests. In this unit, you will learn how plants evolved over millions of years to live on land. You will discover how different plant groups developed new structures to survive, grow tall, and reproduce without needing water.

Biodiversity of Animals: Body Plans of Six Phyla

Animals come in many different shapes and sizes. A jellyfish floats through the ocean, an earthworm burrows through soil, and a spider builds a web. Why are they so different? The answer is their body plan—the basic structure that determines how an animal lives, moves, eats, and survives.

Grade 11 Life Sciences Term 1 Revision: Biodiversity and Classification

This revision document covers everything you learned in Term 1:

Energy Transformations to Sustain Life — Photosynthesis

Every meal you eat and every breath you take depends on photosynthesis. This process allows plants to capture light energy and store it as food. Without photosynthesis, there would be no oxygen to breathe and no food to eat.

Animal Nutrition (Mammals): Fuelling Life Through Food

Your body is like a chemical factory. Every time you eat, food travels through a long tube inside you. Along the way, food gets broken down into tiny pieces small enough to enter your blood. These tiny pieces give your cells the energy and building blocks they need.

Gaseous Exchange: How Living Organisms Get the Gases They Need

Every cell in your body needs oxygen to release energy from food. Every cell also produces carbon dioxide as waste. But how do these gases move between your body and the air around you?

Excretion in Humans: Maintaining the Body's Internal Balance

Your body makes waste every second. When cells break down food for energy, they produce carbon dioxide. When proteins are broken down, they produce a toxic substance called ammonia. If these wastes build up, they will poison you.

Term 2 Revision: Life Processes and Energy Transformations

This revision covers the four big topics from Term 2:

Grade 11 Life Sciences: Mid-Year Examination Preparation

This unit helps you prepare for your Grade 11 Life Sciences mid-year examination. It covers all the main topics from Terms 1 and 2.

Population Ecology

Why do locust swarms appear some years and not others? Why do conservationists debate elephant numbers in Kruger National Park? Population ecology helps us answer these questions.

Population Ecology: Term 3 Revision

This revision guide covers Population Ecology — how groups of organisms grow, interact, and change over time. You will revise the factors that control population size, how species interact with each other, and how human populations affect the environment.

Human Impact on the Environment — Current Crises

Human activities are changing our planet in serious ways. Climate change, water shortages, loss of species, and growing piles of waste threaten our future. South Africa faces many of these problems: droughts in the Western Cape, polluted rivers, and invasive plants destroying natural areas.

Human Impact on the Environment: Term 4 Revision

This revision unit covers how human activities affect our planet's atmosphere, water, food systems, biodiversity, and waste management. You will review the causes and consequences of environmental problems, and learn how to answer exam questions using CAPS command verbs.

Grade 11 Life Sciences: Final Exam Revision Guide

This revision unit helps you prepare for your Grade 11 Life Sciences final exams. You will review all the key content from the year, learn how the exam works, and practise answering questions the way examiners expect.