Some important model organisms
Mammals: Homo sapiens, Chimpanzee, mouse, rat
Fish: Zebrafish, Pufferfish
Insects: Fruitfly (Drosophila melanogaster)
Roundworms: Ceanorhabditis elegans
Protista: Malaria parasite (Plasmodium falciparum)
Fungi: Yeast (Saccharomyces cerevisiae, S. pombe)
Plants: Thale cress (Arabidopsis thaliana), corn, rice
Bacteria: Escherichia coli, salmonella
Archea: Methanococcus janaschii