Question at position 13 Which of the followings statements is true of the rods in the eye's retina?They are insensitive to light.They are very useful for color vision.They are found in the fovea.They require a smaller amount of light to respond than the cones do.

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The question asks which statement about the rods in the eye’s retina is true. 
Option 1: 'They are insensitive to light.' This is incorrect. Rods are highly light-sensitive and function well in low-light conditions, which is one of their defining features, so saying they are insensitive to light misrepresents their role.
Option 2: 'They are very useful for color vision.' This is incorrect. Rods do not mediate color vision; cones are responsible for color perception and daylight vision due to their different photopigments and distribution.
Option 3: 'They are found in the fovea.' This is incorrect. The fovea has a high density of cones and very few rods; rods are concentrated more in the peripheral retina, not in the foveal center.
Option 4: 'They require a smaller amount of light to respond than the cones do.' This is correct. Rods are more light-sensitive and can respond in dim light, whereas cones require brighter illumination to respond. This difference underpins scotopic (rod-dominated) vs. photopic (cone-dominated) vision.

Question at position 13 Which of the followings statements is true of the rods in the eye's retina?They are insensitive to light.They are very useful for color vision.They are found in the fovea.They require a smaller amount of light to respond than the cones do.

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