Monotremes are which type of blooded?

• A. Cold-blooded
• B. Warm-blooded
• C. Variable temperature
• D. Unspecified

Answer: (B)

Warm-blooded describes animals that generate heat through metabolism and maintain a relatively constant internal body temperature. Monotremes, such as the platypus and echidnas, are mammals, so they regulate their body heat internally rather than relying solely on the environment. This endothermy keeps their body temperature stable, even if it’s a bit lower on average than some other mammals. That’s why warm-blooded is the right description. Cold-blooded would apply to reptiles and similar animals that depend more on external heat sources, and terms like variable temperature or unspecified aren’t the standard way to classify thermoregulation.