Edexcel IGCSE Biology: Double Science 复习笔记 2.2.2 Specialised Cells Cell Differentiation & Specialised Cells The structural differences between different types of cells enables them t...
The Random Nature of Nuclear Decay Radioactive decay is defined as: The spontaneous disintegration of a nucleus to form a more stable nucleus, resulting in the emission of an alpha, beta or gamma p...
Edexcel IGCSE Biology: Double Science 复习笔记 2.2.1 Cell Structure Cell Structures Eukaryotic cells have subcellular structures contained within their cytoplasm Each cellular structure carr...
Core Practical 15: Investigating Gamma Radiation Absorption Aim of the Experiment To investigate the absorption of gamma rays by different thicknesses of lead Variables: Independent variable = Thic...
Edexcel IGCSE Biology: Double Science 复习笔记 2.1.1 Levels of Organisation Cells, Tissues, Organs & Organ Systems Cells are the basic building blocks of all living organisms Unicellular...
Edexcel IGCSE Biology: Double Science 复习笔记 1.2.5 Pathogens Types of Pathogen A pathogen is any microorganism that causes disease in another organism (e.g. in plants or animals) Many micr...
Edexcel IGCSE Biology: Double Science 复习笔记 1.2.4 Prokaryotic Organisms Prokaryotes All living organisms can be grouped or ‘classified’ using a classification system that consists of five...
Edexcel IGCSE Biology: Double Science 复习笔记 1.2.3 Eukaryotic Organisms: Fungi & Protoctists Fungi Main features of fungi: They are usually multicellular but some are single-cel...
Nuclear Decay Equations Alpha Decay An alpha particle consists of 2 protons and 2 neutrons (It is emitted from large unstable nuclei) When an alpha particle is emitted from a nucleus: The nuc...
