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Edexcel IGCSE Biology: Double Science 复习笔记 4.2.1 Trophic Levels & Food Chains Trophic Levels & Food Chains Trophic levels Trophic levels are used to describe the feeding relation...
Edexcel IGCSE Biology: Double Science 复习笔记 Abiotic & Biotic Factors In Biology, ‘abiotic’ means non-living An abiotic factor is a non-living factor within an environment such as temperature...
Edexcel IGCSE Biology: Double Science 复习笔记 4.1.2 Practical: Investigating Population Size Practical: Investigating Population Size Ecology is the branch of biology that studies: T...
Edexcel IGCSE Biology: Double Science 复习笔记 4.1.1 Key Terms in Ecology Key Terms in Ecology There are several key terms that we use when referring to the various different components of a...
Edexcel IGCSE Biology: Double Science 复习笔记 3.2.7 Natural Selection Darwin's Theory of Evolution by Natural Selection Charles Darwin proposed the theory of evolution by natural sel...
Edexcel IGCSE Biology: Double Science 复习笔记 3.2.6 Mutation Mutations Mutations are rare, random changes that occur in the sequence of DNA bases in a gene or a chromosome Mutations occur c...
Edexcel IGCSE Biology: Double Science 复习笔记 Types of Variation Types of Variation Variation is defined as differences between individuals of the same species Variation can be divided into...
Edexcel IGCSE Biology: Double Science 复习笔记 3.2.4 Cell Division Mitosis Mitosis is defined as nuclear division giving rise to genetically identical cells This type of cell division is use...
Edexcel IGCSE Biology: Double Science 复习笔记 3.2.3 Predicting Genetic Inheritance Family Pedigrees Family pedigree diagrams are usually used to trace the pattern of inheritance of a specif...
