Edexcel IGCSE Biology 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 need to prepare a ...
Growth Factors in Flowering Plants Growth responses in plants Just like animals, the survival of plants is dependent on their ability to?respond to changes?in their environment Some plants p...
Edexcel IGCSE Biology 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, proteins and li...
The Use of Natural & Artificial Fertilisers When organisms in natural ecosystems?die?or produce?waste, the waste and dead matter?decompose This decomposition is carried out by?saprobiont...
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...
