Final answer:
The current state of research regarding mantis color vision indicates that there is no definitive conclusion, with more studies required. Hence, the correct answer is option (c).
Step-by-step explanation:
The current state of research regarding mantis color vision suggests that no definitive conclusion has been reached, and more research is needed. Color vision in animals varies widely, with differing numbers of photoreceptors responsible for the detection of color.
Humans have three types of cones (red, green, and blue) that allow for trichromatic color vision. While many animals have a more sophisticated vision with multiple cones, the exact mechanism and extent of color perception in mantises remain under investigation.
Mantis vision is not fully understood like that of primates, which have three cones for full color vision, or animals with dichromatic vision who have two cones. Theories of color vision, such as the trichromatic theory and opponent-process theory, explain how color is processed at different levels of the nervous system but do not specifically address the complexities of insect vision. For instance, birds, reptiles, amphibians, and insects may have more cones than mammals, but this does not necessarily translate into a wider range of perceived colors.