Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.4.1 Diffusion Diffusion Theory Diffusion is the?movement of molecules?from a region of its?higher?concentration?to a region of its?lower?conc...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.3.4 Practical: Enzymes & Temperature Practical: Enzymes & Temperature Amylase is an enzyme that digests?starch?(a polysaccharide of g...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.3.3 Enzymes Enzymes as Biological Catalysts Enzymes Enzymes are proteins that act as?biological catalysts?to?speed up?the rate of a chemical ...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.3.2 Practical: Food Tests Practical: Food Tests Preparing a sample Before you can carry out any of the food tests described below, you may ne...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.3.1 Carbohydrates, Fats & Proteins Chemical Elements Most of the molecules in living organisms fall into three categories:?carbohydrates,...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.2.2 Specialised Cells Cell Differentiation & Specialised Cells The?structural differences?between different types of cells enables them t...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 2.2.1 Cell Structure Cell Structures Eukaryotic cells have?subcellular structures?contained within their cytoplasm Each cellular structure carr...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 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 復(fù)習(xí)筆記 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...
