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Transcript
Name: __________________________________ Name the Evolutionary Tactic Evolutionary Tactics Description and In-Class Examples Homologous Structures • Similar structures in different organisms that indicate a common ancestor • Ex: Arm bones Vestigial Structures Coevolution • Structures with no current purpose that may have been useful to an ancestor • Ex: Whale pelvis, snake leg bones, human tailbone • When two species affect each other’s evolution • Ex: Acacia ants and acacia trees Examples 1. 2. 1. 2. 1. 2. 3. Divergent Evolution Convergent Evolution & Analogous Structures Artificial Selection Evolution through Acquired Traits • When different habitats cause related populations to become different. • Ex: Darwin’s Finches • When a similar environment causes unrelated organisms to evolve look alike. • Sometimes tricks people into thinking certain organisms are closely related when they are not. • Ex: Shark and dolphin • When humans purposely select certain traits for breeding and change the evolution of a species. • Ex: Dogs, corn • Posed by Lamarck • Said that characteristics that parents picked up during their lifetimes could be passed on to offspring • Ex: Webbed Feet • DISPROVEN by Weismann 1. 2. 1. 2. 3. 1. 2. 1.
