Which of the Following Was the Earliest Step in the Evolution

question 1

Multiple Choice

Which of the following was the earliest step in the evolution of the vertebrate eye lens?

• A) A patch of tissue folds inward into a cup beneath unpigmented skin.
• B) The cup, the eye, becomes spherical and evolves greater acuity.
• C) Unpigmented skin above a cup of tissue becomes transparent and can focus an image.
• D) Light-sensitive regions bulge outward to the sides of the head.