Edexcel IGCSE Biology 復(fù)習(xí)筆記 2.2.3 Stem Cells Stem Cells A stem cell is an?undifferentiated cell?of an organism that is capable of dividing to produce many more cells of the same type (undifferen...
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 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 to perform?specif...
Edexcel IGCSE Biology 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 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 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?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 復(fù)習(xí)筆記 1.2.4 Prokaryotic Organisms Prokaryotes All living organisms can be grouped or ‘classified’ using a classification system that consists of?five kingdoms. These...
