Edexcel IGCSE Biology: Double Science 复习笔记 3.2.7 Natural Selection
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
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
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
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
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...
Edexcel IGCSE Biology: Double Science 复习笔记 3.2.2 Genetic Inheritance
Edexcel IGCSE Biology: Double Science 复习笔记 3.2.2 Genetic Inheritance Key Definitions A gene is a short length of DNA found on a chromosome that codes for a particular characteristic (exp...
Edexcel IGCSE Biology: Double Science 复习笔记 3.2.1 DNA & the Genome
Edexcel IGCSE Biology: Double Science 复习笔记 3.2.1 DNA & the Genome The Genome The entire set of the genetic material of an organism is known as its genome In 2003, scientists complete...
Edexcel IGCSE Biology: Double Science 复习笔记 3.1.7 Human Sex Hormones
Edexcel IGCSE Biology: Double Science 复习笔记 3.1.7 Human Sex Hormones Secondary Sexual Characteristics Primary sexual characteristics are present during development in the uterus and are t...
Edexcel IGCSE Biology: Double Science 复习笔记 3.1.6 Pregnancy
Edexcel IGCSE Biology: Double Science 复习笔记 3.1.6 Pregnancy Implantation & Development of the Foetus After fertilisation in the oviduct, the zygote travels towards the uterus This usu...
