Question

Name the excretory unit of amoeba and earthworm.

Answer 1

Excretory organ of earthworm is nephridia.

Answer 2

The excretory unit of amoeba and earthworm is called nephridia.    

  Amoeba is a single cell organism in which the contractile vacuole acts as an excretory organ whereas in earthworm the excretory organ is nephridia. The contractile vacuole is amoeba collects the excretory wastes produced inside the cell and dump same outside the cell.

  So we can say that it is the simplest excretory organ in any organism. The excretory organ is the unit required to ejaculate the wastes.