2Try these Balance book on head Hop on one leg Specialisation increases the ability of an organism to carry out complex tasksSome tasks can be completed better by some cells than others.
3Cell specialisationGeneralised cells can divide and specialise (eg meristem cells in plants & stem cells in animals)Specialised cells have specific structure and function, eg epithelial cells, muscle cellsActive cells have more mitochondria, eg animal cells have more than plant cells
10Key words Animal cell Plant cell Active cells Mitochondria Epithelium Back to menuAnimal cellPlant cellActive cellsMitochondriaEpitheliumMuscleNervous tissueConnective tissue
11Quick quizBack to menuTrue / False?Animal cells usually have more mitochondria than plantCentrioles are only found in plant cellsPlant cells have a large vacuoleChloroplasts are found in all photosynthesising plant cellsPlant cell walls prevent cells burstingAnimal cells lose water when placed in pure waterPlant cells undergo plasmolysis when placed in pure waterActive cells (eg muscle & liver) contain many mitochondriaRed blood cells are animal cells so they have a nucleusGoblet cells produce mucousAnswers
12Quick quizBack to menuTrue / False?Animal cells usually have more mitochondria than plant TCentrioles are only found in plant cells FPlant cells have a large vacuole TChloroplasts are found in all photosynthesising plant cells TPlant cell walls prevent cells bursting TAnimal cells lose water when placed in pure water FPlant cells undergo plasmolysis when placed in pure water FActive cells (eg muscle & liver) contain many mitochondria TRed blood cells are animal cells so they have a nucleus FGoblet cells produce mucous T