Edexcel IGCSE Biology 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 glucose)?into mal...
Edexcel IGCSE Biology 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 reaction?without being ...
Indoleacetic Acid (IAA) Indoleacetic acid (IAA) is a?specific growth factor?found in plants IAA is synthesised in the growing tips of roots and shoots (ie. in the meristems, where cells are ...
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...
