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On the basis of locomotory orgenelles, phylum protozoa is classified into how many classes?

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On the basis of locomotory orgenelles, the phylum protozoa is divided into 4 classes. 

1. Class – Flagellata or Mastigophora 

• Locomotion is by flagella 

• Examples : Euglena, Noctiluca, Leishmania, Trichomonas, Trypnosoma etc. 

2. Class – Sarcodina or Rhizopoda 

• Locomotion is by pseudopodia. 

• Examples – Amoeba, Entamoeba, Pelomyxa etc. 

3. Class – Ciliata 

• Locomotion is by cilia. 

• Examples – Paramecium, Vorticella, Didineum, Balantidium, Opalina. Nyctotherus, Spirostomumetc. 

4. Class – Sporozoa 

• Locomotary orgenelles are absent. 

• They are parasitic Examples – Plasmodium, Monocystes, Nosema etc.

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