What term describes animals, such as reptiles, whose internal body temperature largely depends on their external environment rather than being internally regulated?

Explanation

Cold-blooded, or ectothermic, animals, such as reptiles, amphibians, and most fish, have body temperatures that largely fluctuate based on their external environment, since they lack the internal physiological mechanisms to generate and maintain a constant body temperature on their own. This is why reptiles like lizards and snakes are often seen basking in sunlight to raise their body temperature and become more active. Warm-blooded, or endothermic, animals, such as mammals and birds, by contrast, can internally regulate their body temperature to remain relatively constant regardless of external conditions. Explore more Everyday Science MCQs on mcqstutor to keep practicing.