The diagram below is an illustration of the urinary tubule in a mammal. The part which contains the lowest concentration of urea is labelled? by Sunday | Nov 16 | Biology WAEC | 0 comments A. I B. II C. III D. IV Correct Answer: Option C C. III Users Also Read These:Which of the following substances is greater in…In the diagram of the human sperm below, the…The diagram below is an illustration of the urinary…The diagram above illustrates a part of the human…In the diagram below illustrating farm equipment,…