AP BIOLOGY

Detailed explanation-1: -Nearly all the carbon dioxide produced each day is excreted through the lungs in the expired gas, although the liver is capable of disposing of a very small amount through the anaplerotic carboxylation of pyruvate to oxaloacetate.

Detailed explanation-2: -Exhalation of carbon dioxide from the body is an example of excretion.

Detailed explanation-3: -Excretion is the physiological process of elimination of metabolic waste from the body. The excretory products include amino acids, urea, uric acid, carbon dioxide, water, and ammonia. Some Molluscs and Echinoderms excrete waste products from the body in the form of amino acids.

Detailed explanation-4: -These chemical reactions produce waste products such as carbon dioxide, water, salts, urea and uric acid. Accumulation of these wastes beyond a level inside the body is harmful to the body. The excretory organs remove these wastes. This process of removal of metabolic waste from the body is known as excretion.

Detailed explanation-5: -Carbon dioxide, excess water produced during respiration and nitrogenous compounds produced during protein metabolism are the major excretory products in plants.