Cones ______________________.
|  | 
   |  | utilize one type of photopigment in transduction; | 
   |  | utilize three types of photopigments in transduction; | 
   |  | respond to three different ranges of light wavelength; | 
   |  | utilize the photopigment 11-cis-retinal; | 
   |  | both alternatives b and c are correct; | 
   INCORRECT - 11-cis-retinal is the pigment utilized by rods.
   
    
    
   
   
   [Review Part 1 of the tutorial]
   [Review Part 2 (Matching) of the tutorial]