17. What is the primary nitrogenous waste in mammals? (A) ammonia (B) urea (C) uric acid (D) nitrate (E) nitrogenous base

10. Coagulation is a delicate mechanism controlling clot formation and preventing blood drainage. What kind of dietary deficiency and clotting factor deficiency would lead to defective blood clotting and hemophilia A? (A) vitamin E; factor VIII (B) vitamin B12; factor VIII (C) vitamin E; von Willebrand factor (D) vitamin B12; von Willebrand factor (E) vitamin K; factor VIII