Question

1. some snakes are able to detect infrared light using photoreceptors. these photoreceptors are located in their pit organs, not in their eyes. why is this still considered \sight\?

because the photoreceptors connect to the visual areas of the brain.

because the photoreceptors connect to the gustatory region of the brain.

because all detection of light is considered sight.

because these photoreceptors are also present in their eyes.

Explanation:

Sight is defined by sensory input from light-detecting cells that is processed by the brain's visual areas, not just location of receptors. Gustatory regions handle taste, so that is incorrect. Not all light detection counts as sight (e.g., some skin light detection doesn't qualify). The pit organ receptors are separate from eye receptors. The key is that these photoreceptors send signals to the brain's visual processing regions, classifying the input as sight.

Answer:

Because the photoreceptors connect to the visual areas of the brain.