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What are the defining characteristics and unique features of protozoans?

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Understand the Problem

The question is asking for key characteristics and features unique to protozoans, specifically regarding their cellular structure and functions.

Answer

Unicellularity, lack of cell walls, heterotrophy, high surface area to body volume ratio, organelle specialization, contractile vacuoles, trichocysts, toxicysts, and extrusomes.

The defining characteristics of protozoans include their unicellularity, lack of cell walls, heterotrophy, high surface area to body volume ratio, and organelle specialization. Unique features of protozoans include contractile vacuoles, trichocysts, toxicysts, and extrusomes.

Answer for screen readers

The defining characteristics of protozoans include their unicellularity, lack of cell walls, heterotrophy, high surface area to body volume ratio, and organelle specialization. Unique features of protozoans include contractile vacuoles, trichocysts, toxicysts, and extrusomes.

More Information

Protozoa are primarily known for their roles in various ecosystems, both as parasites and free-living organisms. They play important roles in nutrient cycling and can be found in a variety of environments including freshwater, marine, and terrestrial habitats.

Tips

A common mistake is assuming all single-celled organisms are protozoa. Remember, protozoa are specifically heterotrophic eukaryotes without cell walls.

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