TLS Online TPP Program

#Question id: 23773


Which of the following describes the duplicity theory of vision?

#Unit 7. System Physiology – Animal
  1. The existence of  two kinds of input, each working maximally under same conditions of illumination.
  2. The existence of  two kinds of input, each working maximally under different conditions of illumination.
  3. The existence of two kinds of input, each extending minimally under same conditions of illumination.
  4. The existence of two kinds of input, each working simultaneously under same conditions of illumination.