Some students carried out investigations to determine whether a newly discovered animal was an ecotherm or an endotherm - HSC - SSCE Biology - Question 6 - 2008 - Paper 1

This observation indicates that the animal's internal temperature adjusts in response to external environmental changes, a characteristic feature of ectotherms. Typically, ectotherms rely on external heat sources to regulate their body temperature. Therefore, the correct conclusion that aligns with the observation is: The animal is an ectotherm.