Class Clips is changing   CLIP 5522  Evolution of the animal eye
Evolution of the animal eye  Did you know?   Key Info   •
Evolution of the animal eye   • Duration: 2:30   • A description
of the evolution of different eye types in animal species.
Darwin had difficulty with his Theory of Evolution when
considering the origin of the eye. His critics could not believe
that an organ so intricate in mechanism could have evolved by a
natural process. Darwin suggested that it could if progressions
from a simple to complex eye were shown to exist, each useful to
its possessor. There is a demonstration of the gradation from
light sensitive cells in the earthworm, to other organisms where
further refinements exist, to the ultimate visual ability of the
eagle. Darwin believed there were no limits to what the process
could produce.   • Subject:        Bio: Evolution - Theories
• Keywords: Darwin, eye, animal, natural, evolution, snail,
eagle, slug, conch, earthworm, vision, lens, refraction, light,
sensitive, cell Id