Neet Biology Questions of Chapter Excretory products and their elimination
All the living organisms eliminate their body waste and other toxic or excess waste in various ways that reside on the earth. Removal of nitrogenous waste products formed during metabolism from the body of a human is called excretion. Normally excretion means the release of nitrogenous excretory substances like urea Ammonia uric acid etc. Ammonia is excreted by some organisms called ammonotelic such as aquatic amphibians. Urea is excreted by some organisms called ureotelic such as terrestrial amphibians. While uric acid is excreted by some organisms called uricotelic such as reptiles. From all the excretory waste, urea is the least toxic and ammonia is the most toxic.
