One of many cells in the retina of the eye that responds to low light. VOCABULARY

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Explanation:

The retina is the back part of the eye that contains the cells that respond to light. These specialized cells are called photoreceptors. ... The rods are most sensitive to light and dark changes, shape and movement and contain only one type of light-sensitive pigment. Rods are not good for color vision.

The retina is the back thing of the eye that has the cells that respond to the light. These specialized cells are known as photoreceptors.

protons got positive charge