Why do evolutionary biologists say that Tiktaalik roseae is a "transitional species"?
A) It is an extinct species whose DNA sequence indicates that it is intermediate between fish and tetrapods.
B) It is an extant species whose DNA sequence indicates that it is intermediate between fish and tetrapods.
C) It is an extant species whose skeletal structure indicates that it is a morphological intermediate between fish and tetrapods.
D) It is an extinct species whose fossils indicate that it was a morphological intermediate between fish and tetrapods.

Question

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Tiktaalik roseae is considered a transitional species because it is an extinct species whose fossils indicate that it was a morphological intermediate between fish and tetrapods. Its skeletal structure shows characteristics of both fish (such as gills and fins) and tetrapods (such as a flattened head and neck). Its discovery provides evidence for the evolution of fish into tetrapods.

Why Do Evolutionary Biologists Say That Tiktaalik Roseae Is a "Transitional