Parallel evolution occurs when two independent but similar species evolve in the same direction and thus independently acquire similar characteristics for example, gliding frogs have evolved in parallel from multiple types of tree frog. PDF Convergence and parallelism are two forms of independent evolution of similar or identical traits they are often taken as evidence for adaptive. Parallel speciation is a special case of parallel evolution whereby traits causing reproductive isolation evolve in parallel in independent populations that. This means that octopuses do not have a blind spot.Ĭonvergent evolution is similar to, but distinguishable from, the phenomenon of parallel evolution. Parallel evolution occurs when two species evolve independently of each other, maintaining the same level of similarity. These fish have radiated to fill nearly all available niches in the lake. a taxon where parallel evolution has been much discussed. What are the coolest or most interesting examples of parallel evolution East African cichlids Most people who have studied even a little evolutionary biology are aware of the marvelous diversity of the Lake Victoria cichlids. Fibrils on the other hand are structurally homogeneous, with early-stage fibrils distinctly anti parallel in character, which develop parallel -sheets upon maturation. In the octopus version, the eye is constructed the “right way out,” with the nerves attached to the rear of the retina. Evidence of phenotypic parallelism is often used to infer the deterministic role played by. We show that that in the oligomeric stage, the structural ensemble is distinctly bimodal, with the two subtypes differing with respect to population of parallel -sheets. In the vertebrate version the nerve fibers pass in front of the retina, and there is a blind spot (4) where the nerves pass through the retina. \): Eye evolution: Vertebrates and octopuses developed the camera eye independently. Card Text: For each creature token on the battlefield, its controller.
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