The pigment-cup eye of a flatworm can
A) recognise patterns.
B) form a clear image of an object.
C) focus light onto a layer of photopigment.
D) detect the direction of a light source.
E) form images that are subsequently combined physically.

Question

Quizplus · Accepted Answer

The pigment-cup eye of a flatworm is a simple optical structure that allows the organism to detect the direction of a light source but does not have the complexity needed for pattern recognition, forming clear images, focusing light, or physically combining images.

The Pigment-Cup Eye of a Flatworm Can