Question

What type of vision is found in cockroaches?
(A) Mosaic
(B) Super position
(C) Binocular
(D) None of them

Answer 1

Hint: Cockroaches have compound eyes. A compound eye is made from several thousand similar units. Compound eyes are a characteristic of several cockroaches and insects. The compound eyes are situated at the anterior portion (front) of the head. With the assistance of several ommatidia, it receives several images of objects lying side by side. The images formed are of very less resolution.

Complete explanation:
Option A (Mosaic): Through mosaic vision, a cockroach can receive several images of an object but not just one image, and also the sensitivity is more but the resolution of the image is less.
Option A is correct.
Option B (Super position): Most nocturnal insects like moths and beetles, possess refracting superposition eyes during which the lenses and photoreceptors are separated by a good optically clear (i.e. pigment-free) region referred to as the clear zone. Due to strong radial gradients of refractive index, the lenses allow light from many facet lenses to be focused onto single photoreceptors within the retina, thus dramatically increasing light capture.
Option B isn't correct.
Option C (Binocular): Binocular vision may be a sort of vision during which an animal has two eyes capable of facing an equivalent direction to perceive one three-dimensional image of its surroundings. Examples - humans.
Option B isn't correct.
Option D (None of them): This option cannot be correct because the choice A mosaic is the correct answer.
Option D isn't correct.

Hence, Option A is the correct answer.

Note:
Cockroaches (Periplaneta) have two types of eyes: the simple and the compound eyes. They have three simple eyes known as ocelli on their forehead and two large, sessile, black, kidney-shaped structures located on the dorsolateral sides of the head capsule. The group of ommatidia together constitutes the compound eyes. Cockroaches have a compound eye made from approximately \[2,000\] ommatidia that are separated from one another by a pigment sheath which extends from the basement membrane of the eye to the outer transparent corneal layer.