1. The urea in hypertonicity is retained in

2. This is a metabolic waste as a result of protein metabolism

3. The least toxic excretory material is

4. The yellow colour is imparted to the vertebrate’s urine because of

5. This amongst the following is an excretory structure

6. In the urine of frog, the main nitrogenous waste product is

7. In ureotelic animals,

8. For urea formation, the correct order of ornithine cycle is Ornithine ________, ________

9. Who discovered the Ornithine cycle?

10. The main nitrogenous waste in ___________ is uric acid