Protozoan Characteristics and Functions

The video explores the diversity of protozoa, focusing on animal-like protists. It categorizes protozoa into four groups: amoeboid, flagellated, ciliated, and sporozoans. Amoeboid protozoans use pseudopodia for movement and feeding. Flagellated protozoans have whip-like flagella for locomotion and include both parasitic and non-parasitic species. Ciliated protozoans, like paramecium, are highly evolved with cilia for movement and feeding. Sporozoans are parasitic, lack locomotory structures, and absorb nutrients through their cell surface.

What are the three broad categories into which protists are divided?

• Plant-like, animal-like, and fungus-like

• Fungus-like, bacteria-like, and virus-like

• Plant-like, animal-like, and bacteria-like

• Animal-like, bacteria-like, and virus-like

Which characteristic is NOT shared by protozoans and animals?

• Ability to move

• Ability to photosynthesize

• Heterotrophic nature

• Absence of cell walls

How do amoeboid protozoans capture their food?

• By absorbing nutrients through their cell surface

• Using flagella

• By forming pseudopodia

• Through a mouth-like structure

What is the process called by which amoebas engulf food particles?

• Photosynthesis

• Diffusion

• Osmosis

• Phagocytosis

Which of the following is a parasitic flagellate that causes sleeping sickness?

• Giardia

• Trypanosoma

• Paramecium

• Plasmodium

What structure do flagellated protozoans use for movement?

• Cilia

• Pseudopodia

• Flagella

• Tentacles

What is the unique feature of ciliated protozoans that distinguishes them from other protozoans?

• Lack of locomotory structures

• Presence of a cytostome

• Ability to photosynthesize

• Presence of flagella

Which protozoan is known for having a mouth-like structure called the cytostome?

• Paramecium

• Giardia

• Plasmodium

• Amoeba

How do sporozoans obtain nutrients?

• Using a mouth-like structure

• By absorbing nutrients through their cell surface

• By engulfing food particles

• Through photosynthesis

Which disease is caused by the sporozoan Plasmodium?

• Amoebic dysentery

• Malaria

• Giardiasis

• Sleeping sickness