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Protozoan Protists

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Flagellated protozoans - definition

  • They possess flagella for locomotion.
  • They may be free living, aquatics, parasites, commensals.
  • Asexual reproduction is by binary fission.
  • For example, Giardia, Trypanosoma.

Amoeboid protozoans - definition

  • Pseudopodia used for engulfing food particles and locomotion.
  • The body may be covered with plasmalemma or a shell.
  • Asexual reproduction takes place by binary fission, multiple fission, budding and spores.
  • Sexual reproduction occurs through syngamy.
  • For example, Amoeba, Entamoeba.

Sporozoa - definition

  • All sporozoans are endoparasites.
  • Locomotory organs are absent.
  • Nutrition is parasitic.
  • Life cycle has two distinct sexual ans asexual phases.
  • For example, Plasmodium.

Ciliated protozoa - definition

  • Cilia are used for locomotion and driving food.
  • Body is covered by pellicle.
  • Nutrition is holozoic except in the parasitic form.
  • For example, Paramecium, Vorticella.

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