Inclined plane, Wheel and axle, Pulley, Screw, Lever, Wedge, Complex machine (lever and wedge), Complex machine (multiply the force on the object to be cut), Complex machine (pulley, wheel and axle and screw), Pathogen, Microorganism, Allegern, Bacteria, Virus, Fungis, Parasites, Allergen, Disease: Virus, Disease: Bacteria, Disease: Fungus, Disease: Parasite

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