Questions and Answers
Protoctista, or protists, typically possess a single cell structure and are ______.
eukaryotes
Protozoans can obtain nutrition through means such as holozoic, saprozoic, or ______.
symbiotic
The term ______ is reserved for protistans that lack chlorophyll.
Protozoa
Members of the Kingdom Protoctista usually reproduce through an asexual means called ______ fission.
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The classification system proposed by Levine in 1980 recognized Protozoa as a sub Kingdom with ______ phyla.
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The four classes of Protozoa were ______, Sarcodina, Sporozoa, and Ciliata.
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Saprozoic nutrition involves feeding on ______ organic materials.
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The classification system proposed by Levine was approved by the Society of ______ in 1980.
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Protozoans are considered the lowest forms of animals in terms of tissue organization and ______.
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Protozoa are recognized based on the type of ______ organelles they possess.
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Study Notes
Introduction to Protozoa
- Protoctista, or protists, include unicellular or acellular organisms like protozoans and algae (excluding blue-green algae).
- Over 250,000 species of protoctists exist, characterized by their eukaryotic structure (presence of a nuclear membrane).
- Protozoa are considered the simplest animals in the animal kingdom due to their single-cell composition and low complexity.
- The term Protozoa specifically refers to protists that lack chlorophyll and do not photosynthesize.
- Nutrition types in protozoa include:
- Holozoic: intake of complex organic materials.
- Saprozoic: feeding on dead organic materials.
- Symbiotic: living in close biological relationships with other organisms.
- Reproduction in protozoa typically occurs via binary fission, a form of asexual reproduction.
Classification of Protozoa
- Traditionally classified as a Phylum with four classes: Mastigophora, Sarcodina, Sporozoa, and Ciliata, based on locomotory organelles.
- In 1980, Levine proposed a new classification system recognizing Protozoa as a subkingdom.
- The subkingdom Protozoa comprises seven phyla:
- Sarcomastigophora
- Acetospora
- Labyrinthomorpha
- Microspora
- Ciliophora
- Apicomplexa
- Myxozoa
- The classification system by Levine was endorsed by the Society of Protozoologists in 1980.
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Description
Explore the fascinating world of protoctists in this quiz, which delves into unicellular organisms like protozoans and their diverse characteristics. Understand their classification as eukaryotes and learn about their significance in the animal kingdom. Test your knowledge on the structure, complexity, and variety of these unique life forms.
