[Campbell Biology P.1166] Which of the following statements best describes the difference in ... | Practice Question

Which of the following statements best describes the difference in visual information provided by planarian ocelli and insect compound eyes?

  • A: Ocelli detect precise images, while compound eyes detect only light intensity.
  • B: Ocelli primarily determine light direction and intensity, whereas compound eyes are capable of forming detailed images and detecting movement.
  • C: Both ocelli and compound eyes form detailed images, but only compound eyes use photoreceptors.
  • D: Compound eyes detect color better than ocelli, but ocelli offer a wider field of view.

Explanation

Planarian ocelli are simple light-detecting organs that primarily help the animal determine the direction and intensity of light, enabling light avoidance behavior. In contrast, insect compound eyes, composed of many ommatidia, are highly effective at forming detailed visual images and detecting movement across a wide field of view.