Question

a respirometer is a device used to measure the amount of oxygen consumed by an organism. a respirometer was used to determine how environmental temperature affects the uptake of oxygen in one 300 - gram rat and one 50 - gram mouse. the results of this experiment are shown on the graph below. which of the following hypotheses is best supported by the results of this experiment? rats lose more heat per gram of tissue than do mice. rats consume more food per gram of tissue than do mice. mice produce less co2 per gram of tissue than do rats. metabolic rate per gram of tissue is not related to body mass. metabolic rate per gram of tissue is higher in smaller mammals.

Explanation:

By observing the graph, we can see that for the same environmental temperature, the rate of oxygen consumption (a proxy for metabolic rate) per - gram of tissue is higher for the smaller - bodied mouse compared to the larger - bodied rat. This indicates that the metabolic rate per gram of tissue is higher in smaller mammals.

Answer:

Metabolic rate per gram of tissue is higher in smaller mammals.