Excretory Products And Their Elimination

Metanephros in the functional kidney in mammal birds and reptiles. Metanephros develops from posterior part of mesomere. It is also known as posterior kidney. Archinephros type of kidney is present in larval of hagfish caeullians. Ophisthonephros type (mesonephros) is found in fish and amphibians white pronephros occur only in embryo or larval stage, but modified pronephros (head kidney) is found is adult hagfish and several bony fishes.

Answer (d) Both A and B

Answer (a) Metanephric

The animals which excrete uric acid as an excretory product are called as uricotelic animals. For example, terrestrial arthropods (including insects), lizards, snakes, and birds are uricotelic. Hence birds /snake are not ureotelic.