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#cold-blooded animals

3 public questions tagged with this topic.

Adaptation

Which of the following correctly differentiates warm-blooded and cold-blooded animals?

Warm-blooded animals, more precisely endothermic homeotherms, use metabolic heat and physiological regulation to keep core temperature relatively stable across a range of environmental temperatures. Birds and mammals adjust insulation, blood flow, evaporation, shivering, and behaviour to balance heat production and loss. Cold-blooded animals are generally ectothermic, obtaining much of their heat from the environment, so body temperature and physiological rate vary more strongly with external conditions. They can still regulate behaviourally by basking or seeking shade. Hibernation is not excl

Ref: Evolutionary Analysis, Herron & Freeman, 5th Ed., Ch. 10

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Adaptation

Poikilothermic animals:

Poikilothermic animals have body temperatures that vary appreciably over time, often approaching the temperature of their surroundings. Most obtain much of their heat externally and therefore are also ectothermic. A lizard may warm in sunlight and cool in shade; a fish’s body temperature generally follows the surrounding water. This dependence reduces the energetic cost of producing metabolic heat, so food requirements are often lower than in similarly sized endotherms. It does not mean poikilotherms passively accept every temperature. Behavioural thermoregulation—basking, burrowing, changing

Ref: Evolutionary Analysis, Herron & Freeman, 5th Ed., Ch. 10

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Thermoregulation

Cold-blooded animals rely on which factor to regulate body temperature?

Correct option is C, External environment. In Thermoregulation, the accurate description is External environment, and that is what you should commit to memory. Keep the definition tight and the role clear — External environment is the option that correctly names the structure, process, or principle asked for in Thermoregulation. Then External environment is the answer you can defend. Check yourself by covering the options and writing the answer first, then matching the letter — that builds confidence. If the wording feels dense, translate it into everyday language first, then map that plain se

Ref: Animal physiology is Unit 7 of the CSIR NET Life Science Syllabus, covering core body systems. It accounts for roughly 10% of the total marks in Sections B and C.

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