When the subject property is commercial â like office buildings, multi-tenant apartment complexes, hotels, and partially completed condominium developments â one or more of the following characteristics is usually present: 1  Rental income is generated during the foreclosure proceeding.
Other excretory products are pigments, mostly formed. by the breakdown of haemoglobin; drugs etc. Protein metabolism produces nitrogenous waste. material such as ammonia, which is the basic. nitrogenous catabolite of protein, formed by. breakdown of amino acids. Removal of the amino.
Urea is a less toxic compound than ammonia; two nitrogen atoms are eliminated through it and less water is needed for its excretion. Urea is a protein metabolism product at vertebrates and part of the invertebrates. These organisms are called  ureotelic .ll the metabolic wastes are excreted in a form of water solutes through the excretory organs (nephridia, Malpighian tubules, kidneys), with the exception of CO 2, which is excreted together with the water vapor throughout the lungs.