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Q103 (CDS-II/2010) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Animal diversity behaviour Answer Verified

Consider the following statements : 1. Warm-blooded animals can remain active in cold environment in which cold-blooded animals can hardly move. 2. Cold-blooded animals require much less energy to survive than warm- blooded animals. Which of the statements given above is/are correct ?

Result
Your answer: —  Â·  Correct: C
Explanation

Statement 1 is correct because warm-blooded animals (endotherms) maintain a constant internal body temperature through metabolic processes, allowing them to remain active in cold environments where cold-blooded animals (ectotherms) become sluggish or inactive [t1][t6]. Ectotherms rely on external heat sources, and low ambient temperatures can adversely affect their muscle activity and enzyme function [t1][t8]. Statement 2 is also correct; ectotherms have a much lower metabolic rate because they do not use energy to generate internal heat [c1][t5]. This 'economical lifestyle' means they require far less food and energy to survive compared to similar-sized endotherms, who must consume significantly more fuel to maintain their high, stable body temperatures [t2][t5]. Consequently, endotherms have higher energy demands but greater environmental range, while ectotherms have lower energy needs but restricted activity in the cold [t4][t5].

Sources

  1. [1] https://www.nature.com/scitable/knowledge/library/homeostatic-processes-for-thermoregulation-23592046/
  2. [2] Environment, Shankar IAS Acedemy .(ed 10th) > Chapter 29: Environment Issues and Health Effects > 29.3.4. Greeenwashing > p. 419
  3. [3] https://www.sciencedirect.com/topics/veterinary-science-and-veterinary-medicine/endotherm
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