Question

Which animal will lose the most water per volume of air ventilated on a 25°C day, all else being equal?

a. A toad at 15°C
b. A lizard at 25°C
c. A human at 37°C
d. None of these

Answer 1

A lizard at 25°C will lose the most water per volume of air ventilated on a 25°C day, due to their increased ventilation rate to cool down their bodies.

Step-by-step explanation:

The animal that will lose the most water per volume of air ventilated on a 25°C day, all else being equal, is a lizard at 25°C. A lizard at 25°C will lose the most water per volume of air ventilated on a 25°C day, due to their increased ventilation rate to cool down their bodies.

Lizards are ectothermic animals, meaning they rely on external sources of body heat. When the temperature is high, lizards increase their ventilation rate to cool down their bodies, which leads to more water loss through evaporation. Therefore, a lizard at 25°C would lose the most water per volume of air ventilated compared to a toad at 15°C or a human at 37°C.