What is a mapping? A mapping transforms one set of values (inputs) into another set of values (outputs) Mappings can be: One-to-one Each input gets mapped to exactly one unique output No two inputs...
What is the discriminant of a quadratic function? The discriminant of a quadratic is denoted by the Greek letter Δ (upper case delta) For the quadratic function the discriminant is given by This is...
Edexcel IGCSE Biology 复习笔记 3.2.7 Mutation Mutations Mutations are rare, random changes that occur in the sequence of DNA bases in a gene or a chromosome Mutations occur continuously As t...
What affects the inequality sign when rearranging a quadratic inequality? The inequality sign is unchanged by... Adding/subtracting a term to both sides Multiplying/dividing both sides by a positiv...
Edexcel IGCSE Biology 复习笔记 3.2.6 Variation Types of Variation Variation is defined as differences between individuals of the same species Variation can be divided into two types dependin...
Edexcel IGCSE Biology 复习笔记 3.2.5 Cell Division Mitosis Mitosis is defined as nuclear division giving rise to genetically identical cells This type of cell division is used for growth, re...
Solving Quadratics Equations How do I decide the best method to solve a quadratic equation? If it is a calculator paper then use your GDC to solve the quadratic If it is a non-calculator paper then...
Edexcel IGCSE Biology 复习笔记 3.2.4 Predicting Genetic Inheritance Family Pedigrees Family pedigree diagrams are usually used to trace the pattern of inheritance of a specific characteristi...
Edexcel IGCSE Biology 复习笔记 3.2.3 Genetic Inheritance Key Definitions A gene is a short length of DNA found on a chromosome that codes for a particular characteristic (expressed by the fo...
