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Questions and Answers
What is the primary characteristic of all protists?
What is the origin of the term 'Protista'?
What is the nature of the cell of protist organisms?
What is the significance of protists in the evolutionary history of life on Earth?
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What is a characteristic of the nutrition of protists?
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What is the primary function of pseudopodia in amoeboid protozoans?
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What is unique about euglena compared to other protozoans?
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What is the primary mode of reproduction in protozoans?
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What is an example of a symbiotic relationship involving kelp?
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What is the function of contractile vacuoles in amoebas?
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Study Notes
What are Protists?
- Protists are simple eukaryotic organisms that are neither plants, animals, nor fungi.
- They are unicellular in nature but can also be found as a colony of cells.
- Most protists live in water, damp terrestrial environments, or as parasites.
Characteristics of Kingdom Protista
- The primary feature of all protists is that they are eukaryotic organisms with a membrane-enclosed nucleus.
- Other characteristic features of Kingdom Protista include:
- Being usually aquatic, present in soil, or in areas with moisture.
- Being unicellular organisms, but with a few multicellular protists (e.g., kelp).
- Having a nucleus and membrane-bound organelles in their cells.
- Being autotrophic or heterotrophic in nature.
- Exhibiting symbiosis, parasitism, and locomotion through cilia, flagella, or pseudopodia.
- Reproducing by asexual means, with rare instances of sexual reproduction during times of stress.
Classification of Protista
- Kingdom Protista is classified into several groups, including:
- Protozoa: unicellular organisms that are heterotrophic and exhibit animal-like behaviors.
- Examples of protozoans include amoeba, paramecium, and euglena.
- Subgroups of protozoans:
- Amoeboid protozoans (e.g., amoeba): characterized by pseudopodia and found in water bodies.
- Flagellated protozoans: characterized by flagella and found in various environments.
- Sporozoa: parasitic protozoans that infect animals and humans.
- Ciliophora: protozoans with cilia, such as paramecium.
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Description
Learn about Protists, simple eukaryotic organisms that are neither plants, animals, nor fungi, and their characteristics, habitats, and unique features.
