![]() The broader array of compounds in the tetraploids suggests that their chemical systems are still under intense selection pressures. Although the diploids show marked morphological differences, their flavonoid systems have diverged very little. In contrast, the tetraploids elaborate many compounds, both flavones and flavonols. Adaptive radiation is the what the diversification of life into millions of existing species (and even more extinct species) is all about. An analysis of leaf flavonoid chemistry has shown that the diploids synthesize few compounds, all flavonols. Adaptive radiations on archipelagos (island chains) represent some of the best-understood speciation events. ![]() The distribution pattern of the tetraploids suggests that they evolved allopatrically on separate islands rather than within different habitats on single islands as with the diploids. Download the App Get 24/7 study help with the Numerade app for iOS and Android Enter your email for an invite. Among the diploids, the present distribution suggests that the species have evolved allopatrically on single islands through geographical isolation. VIDEO ANSWER: So this question is asking, why is it that islands provide a great opportunity for ad after radiation So, one of most famous examples and biology is gonna be the Galapagos Islands. Polypoloidy played a major role in the formation of two independent evolutionary units. ![]() From the original colonizers, 25 species and four infraspecific taxa evolved. Organisms of one species can arrive to an island together and then disperse throughout the chain, each settling into different niches and exploiting. Adaptive Radiation Period of evolutionary change in which groups of organisms form many new species whose adaptations allow them to fill new or vacant ecological roles in their communities. The Wedelia-like ancestors of Lipochaeta were probably dispersed to Hawaii by water, becoming established either on Kauai or Oahu. Repeated isolation, speciation, and recolonization events on isolated island chains have led to adaptive radiations of species, many of which are found nowhere else in the world. ![]()
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