Evolution of the eye

Common card · No. 271240

The evolution of the eye is the origin and development with diversification by natural selection over geological time of organs of photosensitivity and vision in living organisms. Many scientists have found the evolution of the eye attractive to study because the eye distinctively exemplifies an analogous organ found in many animal forms. Simple light detection is found in bacteria, single-celled organisms, plants and animals. Complex, image-forming eyes have evolved independently several times. Diverse eyes are known from the Burgess Shale of the Middle Cambrian, and from the slightly older Emu Bay Shale. Eyes vary in their visual acuity, the range of wavelengths they can detect, their sensitivity to light, their ability to detect motion or to resolve objects, and to what extent they can discriminate colours.

Read on Wikipedia · Image Matticus78 at English Wikipedia, CC BY-SA 3.0