Photomicrograph (light microscope), Shows whole cells and tissues, Visible structures include cell walls, nuclei, and sometimes chloroplasts, Familiar from school microscopes, Cannot resolve small organelles like ribosomes or internal membranes, Electron Microscope, High magnification and resolution, Shows ultrastructure such as chloroplast grana, mitochondrial cristae, and membrane systems, Useful for studying structure-function relationships, Samples must be dead and chemically fixed, Scientific diagram, Simplified, idealised representation of a cell, All key organelles are clearly labelled, Not to scale, but useful for learning and revision, Common in textbooks and exam questions

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