Question

Ommatidia serve the purpose of photoreception in:

• A. Cockroach
• B. Frog
• C. Humans
• D. Sunflower

Answer 1

The Correct Option is A

To determine which option is correct for the photoreception function of ommatidia, we first need to understand what ommatidia are. Ommatidia are the subunits of a compound eye, which are primarily found in arthropods such as insects and crustaceans. Each ommatidium acts as a simple, independent visual receptor that collectively forms a larger image.

Here we will evaluate each option:

1. Cockroach: Cockroaches have compound eyes composed of numerous ommatidia. These ommatidia allow them to perceive images and detect movement, contributing to their keen ability to avoid threats.
2. Frog: Frogs do not have compound eyes. Instead, they possess simple eyes (also called camera-type eyes) which do not contain ommatidia.
3. Humans: Humans have simple eyes with a single lens for photoreception. Our eyes have rods and cones instead of ommatidia.
4. Sunflower: Sunflowers are plants, and they do not have eyes. They cannot perform photoreception in the context of image formation or perception.

Based on the explanation above, the correct answer is cockroach, since only cockroaches (among the given options) utilize ommatidia for photoreception as part of their compound eyes.