Question

Name the two classes in phylum protozoa which do not possess locomotory organs.

Answer 1

1. Protozoa are unicellular, eukaryotic and heterotrophic organisms.
2. Protozoa are divided into five major classes based on locomotory organelles, namely: Mastigophora or Flagellated protozoans, Sarcodina or Amoeboids, Sporozoa, Ciliophora or Ciliated protozoans and Suctoria.

Out of all the classes in phylum Protozoa, the two classes without locomotory organ are -

1. Sporozoa - Here, there are no locomotory organs. It includes parasites such as Plasmodium.
2. Suctoria - Here, adults do not possess any locomotory organs. It includes Ephelota.