- A Regulators (homeotherms), maintaining constant temperature
- B Conformers (poikilotherms/ectotherms)
- C Migrants that move to avoid unfavorable conditions
- D Mainly aestivators during the driest seasons
Correct answer: B. Conformers (poikilotherms/ectotherms)
Explanation: Conformers (poikilotherms or ectotherms) cannot regulate their internal temperature, which changes along with ambient environmental temperature.
Concept context
How organisms interact with abiotic factors and respond to stress, plus population attributes, growth models, and interspecific interactions such as predation, competition, and mutualism.