What physical traits characterize membership in Class Mammalia for *Cebus capucinus*?
Answer
Having mammary glands, hair or fur, and being warm-blooded
Membership in the Class Mammalia requires several definitive traits that distinguish these vertebrates. The most recognizable characteristic is the presence of mammary glands, allowing females to nurse their young with milk. Furthermore, mammals possess hair or fur covering their bodies, providing insulation. Physiologically, they are endothermic, meaning they maintain a constant, warm-blooded body temperature internally, regardless of external conditions. Additional defining features include having three middle ear bones and the presence of a neocortex in the brain structure.
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