Question

Bony fishes are
A) Ureotelic
B) Uricotelic
C) Aminotelic
D) Ammonotelic

Answer 1

Hint:Bony fishes are also called as the Osteocytes. Bony fishes are the fishes that have skeletons which are primarily composed of bone tissue as opposed to cartilage.

Complete answer:
Ureotelic : Ureotelic organisms are the organisms which excretes urea as their waste.These animals require less water for the excretory purposes as urea is less toxic than that of the ammonia. The ureotelic organisms include bony fishes, adult amphibians, cartilaginous fishes and mammals including humans.
Uricotelic : Uricotelic organisms are the organisms that excrete uric acid as their waste. The uric acid is least poisonous than that of the urea and ammonia. Also the uric acid is least soluble in water as compared to the urea and ammonia. The uricotelic organisms include birds, snakes and lizards.
Ammonotelic: Ammonotelic organisms are the organisms that excrete ammonia in their waste. Ammonia is a highly poisonous compound. Ammonia is water soluble and is produced by the quick diffusion of water. The ammonotelic organisms include cnidarians, echinoderms, fishes, protozoans, platyhelminthes, etc. Therefore, it has been clear from the above discussion that bony fishes are ureotelic .
Hence, the correct answer is option ‘B’.

Note:Ammonia, urea and uric acid all are the metabolic wastes. Metabolic wastes are the substances that are left over from the metabolic processes. These substances are toxic for an organism and cannot be used by the organism so these substances must be excreted from the body of the organism. Different animals have different types of excretory organs such as humans have kidneys.