Which animal is best able to regulate its body temperature through physiological mechanisms?

• A. Fish
• B. Frog
• C. Lizard
• D. Human

Answer: (D)

Verified step by step guidance

1. Understand the concept of thermoregulation: Thermoregulation is the ability of an organism to maintain its body temperature within certain boundaries, even when the surrounding temperature is different.
2. Identify the types of thermoregulation: There are two main types - ectothermy and endothermy. Ectotherms rely on external sources of heat to regulate their body temperature, while endotherms generate heat internally through metabolic processes.
3. Recognize the characteristics of endotherms: Endotherms, like humans, have physiological mechanisms such as sweating, shivering, and altering blood flow to the skin to regulate body temperature.
4. Compare the animals listed: Fish, frogs, and lizards are ectotherms, meaning they primarily rely on external environmental conditions to regulate their body temperature. Humans are endotherms and can regulate their body temperature through internal physiological mechanisms.
5. Conclude with the best regulator: Based on the understanding of thermoregulation, humans are best able to regulate their body temperature through physiological mechanisms compared to the other animals listed.