These comprehensive video lessons help IB Biology students Standard Level (SL) and Higher Level (HL) understand and master the essential concepts needed for success in IB Exams. Each video focuses on C4.2 Transfer of energy and matter and is aligned with the IB Biology syllabus, ensuring focused learning on cell biology, genetics, and ecology. Students can watch and rewatch anytime, anywhere, perfect for visual learners, reinforcing complex concepts, and understanding IB methodology. By using RevisionDojo's video lessons consistently, learners build deep understanding and enter the exam with confidence.
Biology C4.2.1
C4.2.1 Ecosystems
Biology C4.2.2
C4.2.2 Sunlight
Biology C4.2.3
C4.2.3 Flow of chemical energy through food chains
Biology C4.2.4
C4.2.4 Construction of food chains and food webs
Biology C4.2.5
C4.2.5 Supply of energy to decomposers
Biology C4.2.6
C4.2.6 Autotrophs
Biology C4.2.7
C4.2.7 Use of light as the external energy source
Biology C4.2.8
C4.2.8 Heterotrophs
Biology C4.2.9
C4.2.9 Release of energy in both autotrophs and heterotrophs
Biology C4.2.10
C4.2.10 Classification of organisms into trophic levels
Biology C4.2.11
C4.2.11 Construction of energy pyramids
Biology C4.2.12
C4.2.12 Reductions in energy availability at each successive stage in food chains
Biology C4.2.13
C4.2.13 Heat loss to the environment in both autotrophs and heterotrophs
Biology C4.2.14
C4.2.14 Restrictions on the number of trophic levels in ecosystems
Biology C4.2.15
C4.2.15 Primary production as accumulation of carbon compounds in biomass by autotrophs
Biology C4.2.16
C4.2.16 Secondary production as accumulation of carbon compounds in biomass by heterotrophs
Biology C4.2.17
C4.2.17 Constructing carbon cycle diagrams
Biology C4.2.18
C4.2.18 Ecosystems as carbon sinks and carbon sources
Biology C4.2.19
C4.2.19 Release of carbon dioxide into the atmosphere during combustion
Biology C4.2.20
C4.2.20 Analysis of the Keeling Curve in terms of photosynthesis, respiration and combustion
Biology C4.2.21
C4.2.21 Dependence of aerobic respiration on atmospheric oxygen produced by photosynthesis
Biology C4.2.22
C4.2.22 Recycling of all chemical elements required by living organisms in ecosystems