JAMB Biology 2011 Objective — Question 39

Question 39 of 60 from the Joint Admissions and Matriculation Board (JAMB) Biology 2011 Objective paper, with the correct answer and a full explanation.

Which of the following substances when lost from the body of a mammal will not be returned to the ecosystem?

A. A. Sweat
B. B. Urea
C. C. Heat energyCorrect
D. D. Carbon dioxide

Explanation

Sweat, urea and carbon dioxide are returned to the ecosystem; heat energy dissipates and is not returned/recycled in the ecosystem.

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