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Edexcel IGCSE Chemistry 复习笔记 1.1.1 The Three States of Matter The Three States of Matter The three states of matter are solids, liquids and gases A substance can usually exist in all thr...
Edexcel IGCSE Biology 复习笔记 5.4.2 Cloning Mammals Cloning Mammals Embryo cloning It is possible to clone animals using embryo transplants For example, if a farmer wants the best cattle, they mus...
Edexcel IGCSE Biology 复习笔记 5.4.1 Micropropagation Micropropagation Tissue culture is a process in which very small ('micro') pieces of plants (‘tissue’) are grown (‘cultured’) using nutr...
Edexcel IGCSE Biology 复习笔记 5.3.3 Genetic Engineering: Crops Genetic Engineering: Crops Genetically modified plants are plants that have had foreign DNA inserted into their genome This is...
Edexcel IGCSE Biology 复习笔记 5.3.2 Genetic Engineering: Insulin Manufacturing Insulin The gene for human insulin can be inserted into bacteria which then produce human insulin which can be...
Edexcel IGCSE Biology 复习笔记 5.3.1 The Process of Genetic Engineering The Process of Genetic Engineering The gene that is to be inserted is located in the original organism Restriction enz...
Edexcel IGCSE Biology 复习笔记 5.2.1 Selective Breeding Selective Breeding in Animals Selective breeding or artificial selection means to select individuals with desirable characteristics an...
Edexcel IGCSE Biology 复习笔记 5.1.6 Fish Farming Fish Farming Benefits of fish farming Most fish are still caught in the wild (i.e. in the open ocean or in freshwater rivers and lakes) However, ov...
Edexcel IGCSE Biology 复习笔记 5.1.5 Bacteria in Food Production Bacteria in Food Production Microorganisms can be used by humans to produce foods and other useful substances As well as fung...
