Final answer:
The mammal with the highest rate of dehydration due to evaporation will be a mammal in a hot desert with a core temperature of 40°C, as high temperatures and low humidity increase evaporation rates.
Step-by-step explanation:
When considering dehydration in mammals due to evaporation, it is essential to understand that the rate of evaporation is affected by both temperature and humidity. Evaporation uses energy, and this energy is typically taken from body heat. The rate of evaporation is higher in environments with lower humidity. Therefore, the animal that will have the highest rate of dehydration is C. A mammal in a hot desert with a core temperature of 40°C. This is because high core body temperatures can increase the vapor pressure of water in the body, leading to more rapid evaporation, especially in dry desert conditions where the humid is typically low.
Furthermore, in hot and dry conditions, sweating and the subsequent evaporation of sweat from the skin are critical for cooling the body. On the other hand, in humid climates, the higher concentration of water vapor in the atmosphere reduces the evaporation rate, leading to less efficient cooling. In deserts, the lower humidity allows for more efficient evaporation, potentially leading to a higher risk of dehydration.