How can you tell a cell is an animal and not a plant cell?

Animal cells and plant cells contain structures, called organelles. (ask student what an organelle is; a specialised micro-structure within a cell that has a specific function) Some of these organelles are common to both plant and animal cells and some organelles are unique to one type of cell; this is what distinguishes them from one another. (ask student to draw a Venn Diagram; Left hand circle labelled 'Things in plant cells', overlap 'Things in plant AND animal cells' and Right hand circle 'Things in animal cells; ask student to fill in the organelles common to both - briefly asking students what the function is of each organelle and why it is needed by both types of cell).Plant cells contain organelles that animal cells do not. one of these organelles allows the plant cell to enact a function that animal cells cannot; what is this, and what is the name of the organelle that enacts this function?(students may guess photosynthesis; probe students if they cannot recall what plant cells do that animal cells do not i.e. why are plants are green?; plants require sunlight, why?; how do they get their food? - they don't have a digestive system) one organelle that plants possess are chloroplasts; their function is to perform photosynthesis (add this to Venn diagram). In addition plants possess a cell wall and permanent vacuole. (Ask students why these are needed; i.e. what are the main functions of these extra structures) The cell walls strengthens the cell and provides support and the permanent vacuole keeps cells rigid to support the plant. add these to the ven diagram for visual comparison. Challenge more able student by asking chloroplasts may not be found in ALL plant cells, suggest 2 types of plant cells that are unlikely to have chloroplasts and in each case explain why they have none. These are root cells- they have no exposure to light; cells that form petals - their function is to produce pigment to attract insects/ not to photosynthesis etc.)