Vision in cockroach is

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(D) In cockroaches,the compound eyes consist of several independent visual units called ommatidia. Each ommatidium forms a separate image of a part of

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Mosaic

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(D) In cockroaches,the compound eyes consist of several independent visual units called ommatidia. Each ommatidium forms a separate image of a part of the object. These multiple images combine to form a composite image,which is known as mosaic vision. Since the pigment sheath of the ommatidia is non-contractile,the cockroach is capable of only mosaic vision,even during the night.

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