[Solved] Quarks are not present in A) electrons. B) protons. C) neutrons. D) hadrons. Medical Asepsis: Strategies and practices in healthcare designed to reduce the number and transmission of pathogens, including sterilization and use of disinfectants. Hand Antiseptics: Substances used to eliminate or reduce harmful microorganisms from the hands, enhancing hygiene and preventing disease transmission. Microorganism: A microscopic living body not perceivable by the naked eye. Microscopic: Extremely small and detailed, visible only with the aid of a microscope.