Which of the following substances when lost from the body of a mammal will not be returned to the ecosystem? by Sunday | Nov 24 | Biology WAEC | 0 comments A. Sweat B. Urea C. Heat energy D. Carbon dioxide Correct Answer: Option C C. Heat energy Users Also Read These:Which of the following statements about the…The diagram below is an illustration of the urinary…Interdependence within the ecosystem can best be…Which of the following substances is not recycled in…The body temperature of a mammal has to be…