AP BIOLOGY

Detailed explanation-1: -Nitrogenous wastes such as ammonia, urea, and uric acid are formed from digestion of proteins and nucleic acids. These nitrogenous wastes become harmful or toxic if retained inside the body and hence they have to be eliminated with the help of the excretory system.

Detailed explanation-2: -1: Nitrogen excretion: Nitrogenous waste is excreted in different forms by different species. These include (a) ammonia, (b) urea, and (c) uric acid.

Detailed explanation-3: -Ammonia: The most toxic nitrogenous waste is ammonia. Its excretion requires a huge quantity of water. The least toxic nitrogen-containing waste is uric acid.

Detailed explanation-4: -The two types of nitrogenous waste are urea and uric acid. Urea is the byproduct of ammonia in mammals, whereas uric acid is the byproduct of ammonia in birds and reptiles.

Detailed explanation-5: -Yes, urea is a nitrogenous waste. Excretion: Excretion is the process by which nitrogen-containing waste products of metabolism are eliminated from the body. The main source of nitrogenous waste in humans is Urea excretion is known as ureotelism, and the animals that do so are known as ureotelic animals.