Only rods are present in the eyes of which one of the following animals?
A
Pigeon
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B
Squirrel
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C
Fowl
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D
Owl
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Solution
The correct option is D Owl
The retina of an owl's eye has an abundance of light-sensitive, rod cells. Although these cells are very sensitive to light and movement, they do not react well to colour. Cells that react to colour are called as cone cells (shaped like a cone), which are almost absent in an owl's eye, so most owls see in limited colour or in monochrome