Microorganisms Role in Recycling Minerals In natural ecosystems, nutrients (such as nitrogen and phosphorus) are recycled through food webs For example, these nutrients get passed on from pr...
Edexcel IGCSE Biology 复习笔记 2.2.2 Specialised Cells Cell Differentiation & Specialised Cells The structural differences between different types of cells enables them to perform specif...
Edexcel IGCSE Biology 复习笔记 2.2.1 Cell Structure Cell Structures Eukaryotic cells have subcellular structures contained within their cytoplasm Each cellular structure carries out a partic...
Practical Skill: Investigate the Effect of Minerals on Plant Growth Photosynthesis produces carbohydrates Carbohydrates contain the chemical elements carbon, hydrogen and oxygen, which can b...
Edexcel IGCSE Biology 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 microorganisms are pathogen...
How Production is Affected by Farming Practices Farming practices can increase the efficiency of energy transfer in order to increase the total amount of energy available for human consumpti...
Maths Skill: Calculating Percentage Yield Farmers use various strategies to increase the yield of their crops or livestock. These strategies include: Reducing energy losses from crops to oth...
Edexcel IGCSE Biology 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 kingdoms. These...
Maths Skills: Calculating Productivity and Efficiency within Ecosystems Given the appropriate data, it is possible to calculate the net productivity of producers or consumers and the efficie...
