During a zoological survey, a vertebrate specimen was studied and the following characteristics were documented: A. The endoskeleton is fully ossified (bony) and the long bones are hollow with air cavities. B. The digestive tract features additional chambers, namely the crop and gizzard. C. The animal is homoiothermous and possesses a completely four-chambered heart. Which of the following organisms exhibits the abov

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The characteristics provided in the question are typical features of the class Aves (birds). A. The presence of a fully ossified endoskeleton with hollow long bones containing air cavities (pneumatic bones) is a unique adaptation in birds to reduce body weight for flight. B. The digestive tract of birds includes additional chambers: the crop (for storing food) and the gizzard (for crushing and grinding food). C. Birds are homoiothermous (warm-blooded) animals and possess a completely four-chambered heart. Evaluatin