character: Tiktaalik
topic: Transitional species between fish and tetrapods
grade: 11
subject: Biology
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character: Archaeopteryx
topic: Transitional species between dinosaurs and birds
grade: 11
subject: Biology
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character: Ambulocetus
topic: Transitional species between land mammals and whales
grade: 11
subject: Biology
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character: Australopithecus afarensis
topic: Transitional species in human evolution
grade: 11
subject: Biology
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