Volumes of revolution around the x-axis What is a volume of revolution around the x-axis? A solid of revolution is formed when an area bounded by a function (and other boundary equations) is rotat...
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 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 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 Implantation & Development of the Foetus After fertilisation in the oviduct, the zygote travels towards the uterus This usu...
Edexcel IGCSE Biology: Double Science 复习笔记 3.1.5 Sexual Reproduction in Humans The Male Reproductive System The male reproductive system Male Reproductive Str...
Edexcel IGCSE Biology: Double Science 复习笔记 3.1.4 Asexual Reproduction in Plants Asexual Reproduction in Plants Plants can reproduce asexually as well as sexually Asexual reproduction onl...
Edexcel IGCSE Biology: Double Science 复习笔记 3.1.3 Practical: Conditions for Germination Practical: Conditions for Germination Germination is the start of growth in the seed Three factors ...
Edexcel IGCSE Biology: Double Science 复习笔记 3.1.2 Sexual Reproduction in Flowering Plants Pollination Flowers are the reproductive organs of plants They usually contain both male and fema...
Edexcel IGCSE Biology: Double Science 复习笔记 3.1.1 Types of Reproduction Sexual Reproduction Sexual reproduction is: The process involving the fusion of the nuclei of two gametes to...
Edexcel IGCSE Biology: Double Science 复习笔记 2.10.11 The Endocrine System The Endocrine System Information is sent through the endocrine (hormonal) system as chemical substances known as h...
Edexcel IGCSE Biology: Double Science 复习笔记 2.10.10 Temperature Regulation The Role of Skin in Temperature Regulation The skin is our largest sense organ It contains many different recept...
