英和和英

出典:『Wikipedia』 (2011/02/20 20:57 UTC 版)

英語による解説

引用

In phylogenetics, a derived trait is a trait that is present in an organism, but was absent in the last common ancestor of the group being considered. This may also refer to structures that are not present in an organism, but were present in its ancestors, i.e. traits that have undergone secondary loss. Here the lack of a structure is a derived trait.