Question

Compound eye are found in
A. Frog
B. Earthworm
C. Cockroach
D. Roundworm

Answer 1

Hint: Eyes are an important sensory organ that have lenses and are light sensitive. The eyes collect data from the surroundings and help the brain to process an image. The lenses present in the eye determines the quality of the vision which in turn determines the detail in which a particular image is viewed. The development of eyes varies in different types of organisms.

Complete answer:
A compound eye is a type of visual organ consisting of numerous subunits or eye units which are known as the ommatidia. The compound eye is made up of many units of ommatidia. The ommatidia are tiny photoreceptor units. It consists of lens, cornea and photoreceptor cells. The photoreceptor cells are responsible for distinguishing the colour and brightness of the image. The image produced by the compound eye has poor resolution but the image produced by the combined inputs from numerous ommatidia.
The different ommatidia are pointed in different directions but they have a very large view angle. It also bears the ability to detect fast movement in the surroundings and sometimes can also sense the polarisation of light.
Each of the ommatidium acts as a separate visual receptor. The structural organisation of the ommatidium reveals the presence of a lens, visual cells, pigment cells etc. The lens of the ommatidium is a single facet like structure and is the front surface. The visual cells are light sensitive in nature and are arranged in a radial pattern. The pigment cells delimit each ommatidium and it ensures that the light entering the ommatidium is parallel to the long axis and reaches to the visual cells. The pigment cells induce nerve impulses. The working of the ommatidium is such that it is pointed at a single area and contributes information about a small area in the field of view. The image produced by the compound eyes are mosaic in nature and the image is a pattern of light and dark areas. This type of eyes are found in arthropods especially in the insects and crustaceans. These types of eyes are the characteristics of cockroaches.
The eyes of frogs are bulging which allows them to visualize the surroundings from all the sides even from behind to some extent. The eyes in frogs are extremely sensitive to light and night vision is superior in nature. The earthworm does not possess eyes but does contain receptor cells which are sensitive to light. The roundworms are parasitic organisms and do not contain eyes.

Therefore, the correct option is option C.

Note:
The compound eye are the characteristics of cockroaches and other arthropods. The compound eyes consist of several multiple units known as the ommatidia. Each ommatidium acts as a separate eye and the complete image is produced by the combined effect of all the ommatidia. The image produced is in the form of a mosaic image that is formed by light and dark areas.