Adding and Subtracting Volumes Why might I need to add or subtract volumes of revolution? As with the area between a curve and a line or the area between 2 curves, a required volume may be created ...
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 ...
