Evolution of Eyes and Photoreceptor Organelles in the Lower Phyla

Resource type
Date created
1984
Authors/Contributors
Abstract
How could. such a complex organ as the vertebrate eye have evolved by natural selection of numerous, successive, slight modifications? Charles Darwin posed this question but could not answer it satisfactorily because of the rather limited knowledge of invertebrate eyes in his day.For the vertebrate eye, though genetically inheritable variations are known, the question cannot be answered even today because of the lack of examples to fill the huge gap between the relatively primitive pigment-cup eyes of chordate ancestors and the fully-developed lens eye of the simplest vertebrates. Fortunately, as we now know, the lens eye has evolved independently several other times, and stepwise evolution is suggested by the existence of intermediate grades along those distinct lines.
Document
Published as
Burr, A.H. Evolution of Eyes and Photoreceptor Organelles in the Lower Phyla. In Photoreception and Vision in Invertebrates, M.A. Ali (ed.). New York: Plenum Press, 1984. 131-178.
Publication title
Photoreception and Vision in Invertebrates
Document title
Evolution of Eyes and Photoreceptor Organelles in the Lower Phyla
Publisher
New York: Plenum Press
Date
1984
First page
131
Last page
178
Copyright statement
Copyright is held by the author(s).
Scholarly level
Peer reviewed?
Yes
Language
Member of collection