| 释义 |
convergent evolution
convergent evolutionn. See convergence.conver′gent evolu′tion
n. the evolution of apparently similar structures in organisms of different lines of descent. [1965–70] convergent evolutionEvolution of similar features in unrelated organisms as adaptations to similar lifestyles, e.g. wings in birds and bats.EncyclopediaSeeevolutionconvergent evolution
evolution [ev″o-lu´shun] the process of development in which an organ or organism becomes more and more complex by the differentiation of its parts; a continuous and progressive change according to certain laws and by means of resident forces.convergent evolution the development, in animals that are only distantly related, of similar structures or functions in adaptation to similar environments.con·ver·gent ev·o·lu·tionthe evolutionary development of similar structures in two or more species, often widely separated phylogenetically, in response to similarities of environment; for example, the wing-like structures in insects, birds, and flying mammals.convergent evolutionn. See convergence.con·ver·gent ev·o·lu·tion (kŏn-vĕr'jĕnt ev'ŏ-lū'shŭn) The evolutionary development of similar structures in two or more species, often widely separated phylogenetically, in response to similarities of environment; for example, the wings in insects, birds, and flying mammals. convergent evolution 1. The process in which phylogenetically distinct lineages acquire similar characteristics. 2. Evolutionary changes in which descendants resemble each other more closely than their progenitors did. convergence or convergent evolution or parallelism a form of evolution which results in unrelated organisms independently producing similarities of form, usually because they become adapted to living in similar types of environment. For example, fish and cetaceans have evolved similar streamlined body shapes and fins.FinancialSeeConvergence |