title: Nested structure acquired through simple evolutionary process.
authors.affiliation: Department of Computational Biology, Graduate School of Frontier Sciences, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8561, Japan. takemoto@cb.k.u-tokyo.ac.jp
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Takemoto
authors.forename: Masanori
authors.initials: M
authors.lastname: Arita
mesh_terms: D000818:Animals; D044822:Biodiversity; D005075:Biological Evolution; D017753:Ecosystem; D008954:Models, Biological; D063245:Plant Development; D010944:Plants / Q000469:parasitology; D054817:Pollination / Q000502:physiology; D011157:Population Dynamics; D013559:Symbiosis / Q000502:physiology