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According to Koch's postulates, in order to prove that any given infectious agent causes a certain disease a scientist must satisfy all of the following requirements EXCEPT:
Chromoplasts
Plant cell organelles that contain pigments and are responsible for the colors of fruits and flowers.
Pigments
Substances that give color to materials by absorbing certain wavelengths of light and reflecting others, widely used in paints, inks, and biological functions.
Motor Proteins
Proteins that convert chemical energy into mechanical work, driving cellular movements such as muscle contraction and intracellular cargo transport.
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