Many animals are classified as either ectotherms (cold-blooded) or endotherms (warm-blooded). Ectotherms must get their heat from an exterior source, whereas endotherms regulate their body temperatures from within. Since metabolic processes are affected by body temperature, which statement BEST compares the cellular respiration rate of ectotherms to endotherms?
Ectotherms have a metabolic rate that is more variable than endotherms.
Ectotherms have a metabolic rate that is always slower than endotherms.
Ectotherms have a metabolic rate that is more constant than endotherms.
Ectotherms have a metabolic rate that is always faster than endotherms.
