DURATION: 1 HOUR FECTION A (10 Marks) Answer all questions. Which of the following is a nitrogenous waste in plants? (A) Urea (B) Cocaine (C) Latex (D) Oil Which of the following is excreted by plants only? (A) Alkaloids Carbon dioxide (C) Excess salts Which of the following is not an excretory product of the hun (A) Amino acids (B) Carbon dioxide Qurea (D) Exc Which substance is present at a lower concentration in the vein? (A) Amino acids Carbon dioxide (C) Glucose (D) What happens to blood as it passes through a kidney machin (A) Carbon dioxide is removed Glucose is adde (D) Urea is removed Urea is produced in the Kidney (D) Live