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|Published on: Nov 16|Categories: Biology WAEC| 0 comments A. I B. II C. III D. IV Correct Answer: Option C C. III Users Also Read These:The diagram below is an illustration of farm…Using the diagram, the part labelled IV is for?The diagram above illustrates a part of the human…In the diagram, the part labelled II is the?The diagram below is an illustration of human sperm.…SEE ALSO Which of the following best describes the adaptation of the earthworm to its habitat?