Which of the following is an advantage that ectotherms have over endotherms of the same size?

• A. Greater ability to survive in cold environments
• B. Lower metabolic rate
• C. Higher body temperature regulation
• D. Faster growth rates

Answer: (B)

Verified step by step guidance

1. Understand the difference between ectotherms and endotherms: Ectotherms rely on external environmental conditions to regulate their body temperature, while endotherms maintain a constant body temperature through internal metabolic processes.
2. Consider the metabolic rate: Ectotherms generally have a lower metabolic rate compared to endotherms because they do not need to generate heat internally to maintain body temperature.
3. Analyze the advantages of a lower metabolic rate: A lower metabolic rate means ectotherms require less energy and food to survive, which can be advantageous in environments where resources are limited.
4. Evaluate the options given: Compare each option to the characteristics of ectotherms. A lower metabolic rate aligns with the known advantage of ectotherms, as it allows them to conserve energy.
5. Conclude with the correct advantage: Based on the analysis, the advantage that ectotherms have over endotherms of the same size is their lower metabolic rate, which allows them to survive with less energy intake.