[Solved] The 'net assets' of a business is equal to current assets plus current liabilities. Optical Microscope: An instrument that uses visible light and lenses to magnify objects, allowing for the observation of small details that cannot be seen by the naked eye. Focus Control: The adjustment or regulation of the clarity and sharpness of an image in photography or optics. Sterilization: The destruction of all microorganisms, including bacterial spores, by specific means. Organisms: Living entities that can act or function independently, ranging from single-celled bacteria to complex multicellular forms like animals and humans.