Final answer:
The root of the word 'photogenic' is 'photo,' referring to light, and is also found in terms related to light in scientific contexts such as phototropism and photosystem.
Step-by-step explanation:
The root of the word photogenic is 'photo.' This comes from the Greek word 'phos' or 'photos,' which means light. The suffix 'genic' comes from the Greek 'genes,' which means 'born of' or 'produced by.' Therefore, photogenic means 'produced by or associated with light.' This root is also seen in other science-related terms such as phototropism, which is the directional bending of a plant toward a light source, and photosystem, which refers to complexes essential to photosynthesis.