premise: Like fish and amphibians, reptiles are ectothermic animals, which is to say that they produce very little metabolic heat and their body temperature depends essentially on that of the environment.
hypothesis: Reptiles are described by the term ectothermic, which means their internal temperature depends on the temperature of their environment.
hypothesis_graph_structure: Reptiles<>are described<>by the term ectothermic$$$the term ectothermic<>means<>their internal temperature depends on the temperature of their environment$$$their internal temperature<>depends<>on the temperature of their environment