Define organic evolution in three words Share with your friends Share 1 Priya Jethwani answered this Organic Evolution is the scientific process of identifying a genetic change in a species or within a group of species over a certain period of time............... 1 View Full Answer Priya Jethwani answered this For example:--- (i) Ana-logous organs -- Wings of insects and birds (ii) Evi-dence from missing links -- Archae-opteryx 1