Regarding the trichromatic theory of color vision, which statement is most accurate?
a. the theory maintains that receptor cells are grouped in pairs, such as black-white.
b. specialized cells in the retina engage in a process called feature detection.
c. specialized cells in the retina are sensitive to blue-violet, green, and yellow.
d. the theory us understand why we see afterimages of different colors.

C. Specialized cells in the retina are sensitive to blue-violet, green, and yellow.

Explanation:

The color vision trichromatic theory states that the human eye has cells, called rods and cones, which are sensitive to light and allow the visualization of colors. The rods are able to establish an image through the different intensities of light in an environment, while the cones can identify different wavelengths of light, being able to distinguish the colors. In addition, other cells are sensitive to a certain color pattern, as is the case with specialized cells in the retina are sensitive to blue-violet, green and yellow.

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.