9.0. Introduction 9.1. Ecological Pyramids 9.1.1. Pyramid of Numbers 9.1.2. Pyramid of Bio Mass 9.1.3. Pyramid of Energy 9.2. Effects of Human Activities
1 - Nutrition 2 - Respiration – The Energy Releasing System 3 - Transportation – The Circulatory System 4 - Excretion – The Wastage Disposing System 5 - Coordination – The Linking System 6 - Reproduction – The Generating System 7 – Coordination in Life Processes 8 – Heredity – From Parent to Progeny 9 – Environment – Our Concern