Question

how amoeba and other unicellular animals get rid of thier rid of their nitrogenous waste

Answer 1

Excretion is an important process by which waste material is excreted out of the from the body. In unicellular organisms like amoeba, the waste material such as nitrogenous waste formed from the breakdown of proteins and amino acids, water and salts are passed out through contractile vacuoles while the waste product of metabolism i.e, CO₂ is remove by diffusion through body surface.