Which of the following substances are generally accumulated by creatures as waste products?
Oxygen and glucose
Nitrogenous composites and ions
Lipids and proteins
Vitamins and minerals
Creatures accumulate ammonia, urea, uric acid, carbon dioxide, water and ions like Na, K, Cl –, phosphate, sulfate,etc., either by metabolic conditioning or by other means like redundant ingestion. Hence, option 2 is the correct answer.