Cnidarians are incredibly diverse in form. Yet, these diverse animals are all armed with stinging cells called nematocysts. Thousands of cnidarian species.
The evolution of complex characters—Two Themes: 1)Complex characters can evolve gradually via intermediate forms (if those forms have adaptive value) 2)Cooption.
Cnidaria
Introduction to Cnidaria Jellyfish, corals, and other stingers. . .
Mollusks : gastropods, bivlaves and cephalopods
Http://soe.ucdavis.edu/ss0708/pimentela/images/Jellyfish.jpg.
Origins of Biological Diversity Chapter 15 Page 323.
The evolution of complex characters—Two Themes:
HUMAN EYE Project
Formation of Culture: From Lucy to Postmodernism
Darwinian Natural Selection I.Motivation Most powerful mode of evolution.
Phylum Mollusca Ancestral Protist segmentation true tissue radial symmetry bilateral symmetry Deuterostomes: eucoelom Protostome: schizocoelem pseudoc.
