→ Divergent evolutions are derived from the same embryological tissues or homologous organs, but they are designed to do different jobs and hence they have adapted to different needs. The thorns of Bougainvillea and the tendrils of Cucurbita exhibit homology. → Adaptive radiation is a phenomenon by which a given population of a species changes when it gets distributed in different habitats in a particular region. The marsupials in Australia separated from their common ancestors and continued to evolve independently → The dark-winged moths were naturally selected over the white-winged moths and have almost replaced white-winged moths. This is called industrial melanism because of its association with industrialization. → Genetic drift refers to the alteration in the frequencies of alleles in the gene pool of a finite population due to chance events. It takes place in one or over a few generations. If the change in the allele frequencies is very drastic, then new species are formed.