Question

what are protozoans? Explain in detail.

Answer 1

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Your answer is...

Protozoans are single cells micro organisms of a group of phyla of the kingdom protista such as sporozoan, amoeba, ciliate and more.


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Answer 2

Answer :

Protozoans -

• They are a type of Protista.
• Protozoans are said to be heterotrophic.
• They are either predators or parasites.
• They are believed to be primitive relatives of animals.
• The four major groups of protozoans include Amoeboid, Flagellated, Ciliated and sporozoans.

Amoeboid Sporozoans -

• They live in freshwater, sea water or moist soil.
• They move and capture prey by pseudopodia.
• The Marine forms of amoeboids have silica shells on their surface.
• For example : Amoeba.
• Some are parasites, like : Entamoeba.

Falgellated Sporozoans -

• They are free living or parasitic.
• They have flagella.
• Parasitic form of Falgellated sporozoans cause diseases like sleeping sickness.
• Eg : Trypanosoma.

Ciliated Protozoans -

• They are aquatic.
• They are more active by using cilia.
• They have a cavity called gullet that opens to outside.
• Due to movement of cilia, water with food enters into gullet.
• Eg : Paramecium.

Sprozoans -

• They are infectious spore like stage in the life cycle.
• Eg : Plasmodium (malarial parasite) which causes malaria.