Standard metabolic rate (SMR) and basal metabolic rate (BMR) are _________.
A. used differently: SMR is measured during exercise, whereas BMR is measured at rest
B. used to compare metabolic rates during feeding and other active conditions
C. both measured across a wide range of temperatures for a given species
D. both measured in animals in a resting and fasting state



Answer :

Standard metabolic rate (SMR) and basal metabolic rate (BMR) are both measured in animals in an resting and fasting rate. So the correct option is D

A measurement of an animal's "baseline" metabolic rate is its basal metabolic rate (BMR) for endotherms or its standard metabolic rate (SMR) for ectotherms. Measuring metabolic rate in animals at rest, calm or unstressed, and not actively digesting food, Some animals can control their metabolic heat production to keep their body temperatures roughly consistent. These creatures are endotherms. animals that don't generate metabolic heat to keep their bodies at a steady temperature. Instead, they react to environmental temperature fluctuations by altering their body temperature are called ectotherms

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