Which of the following was likely the first adaptation to occur during the evolution of the human eye?
A) A protective cover and internal structures
B) A depression where information about light and light movement is collected
C) A simple, light-sensitive photo receptor
D) Neural machinery for image processing

Question

Quizplus · Accepted Answer

The evolution of the human eye likely began with the development of a simple, light-sensitive photo receptor. This basic component is present in all eyes and is essential for detecting changes in light intensity.

Option A is incorrect because protective cover and internal structures require more complex, specialized cells that would have come later in the evolution of the eye.

Option B is incorrect because a depression where information about light and light movement is collected is more advanced than a basic photo receptor, and would have come later in the evolution of the eye.

Option D is incorrect because neural machinery for image processing is even more advanced than a depression, and would have come much later in the evolution of the eye.

Which of the Following Was Likely the First Adaptation to Occur