Exploring Protista: Classification and Ecological Significance

Microbiology

Protistology

Cell Biology

NGSS

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Quizzes Created: 8156 | Total Attempts: 9,588,805

| Attempts: 11 | Questions: 19 | Updated: Aug 4, 2025

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1. Clade Discicristales: Trypanosome.

Multiple flagella throughout the body; free-living; non-parasitic; not attached to blood cells.

1 or 2 emerging from pit; parasitic; attached to blood cellsUndulating membrane; creates more SA allowing for better mobilityKinetoplast: to... 1 or 2 emerging from pit; parasitic; attached to blood cellsUndulating membrane; creates more SA allowing for better mobilityKinetoplast: to be self-reproducing,DNA-containing, and double-membrane bound like mitochondria

Lack of flagella; non-reproducing; DNA-free; single-membrane structure.

Smooth cell surface; no undulating membrane; limited mobility; lack of kinetoplast.

The correct answer describes key characteristics specific to the Clade Discicristales: Trypanosome, such as the number of flagella, parasitic nature, attachment to blood cells, presence of an undulating membrane for better mobility, and the unique kinetoplast structure.

Explanation

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About This Quiz

Explore the intriguing world of Protista with this focused educational content. Delve into the structural complexities of protists, enhancing your understanding of their biological classification and ecological significance. Ideal for students and enthusiasts eager to deepen their knowledge in microbiology and cell biology.

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2. What is a characteristic of Clade Amebozoa known as lobose amoebas?

Psuedopods for feeding and locomotion

Cilia for propulsion

Gills for respiration

Flagella for movement

Clade Amebozoa, specifically lobose amoebas, are known for their use of pseudopods for both feeding and locomotion. Pseudopods are temporary bulges of the cell membrane that extend and contract allowing the amoeba to move and capture food.

Explanation

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3. What is a defining characteristic of the Clade Amebozoa subphylum Arcellina?

Active locomotion using flagella.

Photosynthesis as the primary mode of obtaining nutrients.

Body enclosed in a test with psuedopods protruding out

Presence of a rigid exoskeleton for protection.

The correct answer describes the unique feature of Arcellina within the Amebozoa clade, which is the presence of a protective test surrounding the body with pseudopods extending out.

Explanation

The correct answer describes the unique feature of Arcellina within the Amebozoa clade, which is the presence of a protective test surrounding the body with pseudopods extending out.

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4. What type of shells do Foraminifera in the clade Cercozoa have?

Multied cambered shells (Calcareous)

Single chambered shells (Siliceous)

Branched shells (Ceramic)

Spiral shells (Chitinous)

Foraminifera in the clade Cercozoa are known for having multichambered shells made of calcium carbonate (Calcareous), which sets them apart from other groups.

Explanation

Foraminifera in the clade Cercozoa are known for having multichambered shells made of calcium carbonate (Calcareous), which sets them apart from other groups.

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5. What characteristic defines a radiolarian belonging to the Clade Cercozoa?

Actinopodia radiating from spherical body

Photosynthetic pigments

Flagella for movement

Ciliated feeding apparatus

Radiolarians in the Clade Cercozoa are known for their actinopodia that radiate from their spherical body, aiding in movement and capturing food.

Explanation

Radiolarians in the Clade Cercozoa are known for their actinopodia that radiate from their spherical body, aiding in movement and capturing food.

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6. Clade Alveolates; Ciliate; kinetofragminophera(Didinium).

No compound ciliary organelle

Photosynthetic organelles present

Ability to form multicellular colonies

Presence of flagella

Didinium, belonging to the Ciliate clade within Alveolates, is characterized by the absence of compound ciliary organelles, making it unique compared to other organisms within the same clade. The incorrect answers are based on features that are not typically associated with this specific organism.

Explanation

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7. Clade Alveolates; Ciliate; Oligohymenophora(paramecium).

This question is asking for the classification of the organism Paramecium within the Clade Alveolates. The correct answer 'a.' indicates that Paramecium belongs to the subphylum Oligohymenophora within the class Ciliate in the Clade Alveolates.

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8. Clade Alveolates; Ciliate; Oligohymenophora(Voticella).

This question is testing knowledge of the taxonomic classification of organisms. In this case, the correct answer corresponds to the specific classification of Voticella within the taxonomic hierarchy of Alveolates. The incorrect answers have been provided as distractors to challenge the participant's understanding.

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9. Clade Alveolates; Ciliate; Polyhymenophora(spirostomum).

This question is testing the knowledge of the classification of organisms within the Alveolates clade specifically focusing on Ciliates. The correct answer 'a.' corresponds to the given classification of Polyhymenophora(spirostomum) within the Ciliate group of Alveolates.

Explanation

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10. Clade Alveolates; Ciliate; Polyhymenophora(Blepharisma).

This question tests knowledge of the classification of the organism Blepharisma within the Clade Alveolates specifically in the class Ciliate. Polyhymenophora is a subclass of Ciliates, and Blepharisma is a genus within that subclass.

Explanation

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11. Clade Alveolates; Ciliate; Blepharisma.

Spore formation for reproduction

Flagellum for movement

Line of macronucleuscytostome

Chloroplast for photosynthesis

In the context of Clade Alveolates Ciliate Blepharisma, the correct answer 'line of macronucleuscytostome' refers to a specific feature of Blepharisma. This feature is involved in the functioning of the macronucleus and cytostome in the ciliate's cell structure.

Explanation

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12. What is the principal function of contractile vacuoles in Amoeba proteus?

Principal function isosmoregulation, keeping the right concentration of salts on the inside of thecell by removal of the diluting water... Principal function isosmoregulation, keeping the right concentration of salts on the inside of thecell by removal of the diluting water that enters due to osmosissee in Amoeba proteus

Cell division

Gas exchange

Nutrient absorption

Contractile vacuoles in Amoeba proteus primarily serve the purpose of osmoregulation by regulating the concentration of salts inside the cell. This is achieved by removing excess water that enters the cell due to osmosis, helping maintain the cell's internal balance.

Explanation

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13. What is the function of trichocysts?

Trichocysts store excess nutrients for times of scarcity in organisms.

; some paralyzing orstunning prey organisms (toxicysts), while others like those found inParamecium provide attachment while feeding.

Trichocysts are used for reproduction in single-celled organisms.

Trichocysts aid in respiration by absorbing oxygen from the environment.

Trichocysts are specialized organelles found in certain protozoans like Paramecium, and are used for defense mechanisms by either paralyzing or stunning prey organisms, as well as providing attachment for feeding.

Explanation

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14. What is the structure of Euplotes?

Flat sheets

Randomly scattered cilia

Cirri like membranells arecomposd of fusd cillia. In thisstructure, however the cilia are fused into conical projections rather thanflattened... Cirri like membranells arecomposd of fusd cillia. In thisstructure, however the cilia are fused into conical projections rather thanflattened sheetscylindrical

Spherical cilia

The correct structure of Euplotes is that the cilia are fused into conical projections forming cirri like membranells.

Explanation

The correct structure of Euplotes is that the cilia are fused into conical projections forming cirri like membranells.

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15. Why do dinoflagellates have 2 grooves?

For transverse and longitudinal flagellum making organism twirl for means of locomotion

To increase their resistance to predators.

To store excess nutrients for survival.

For better camouflage in their environment.

The correct answer explains the purpose of the grooves in dinoflagellates, which is for locomotion. The incorrect answers provided do not align with the specific function of the grooves in dinoflagellates.

Explanation

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16. What is a pylome?

A term used in architecture to describe a specific type of column structure.

Amebozoa; arcellinaa hole in the test that allows for the pseudopod to protrude out and catch food

A type of bird found in tropical rainforests.

A type of flowering plant commonly used in herbal medicine.

A pylome is specifically related to the Amebozoa; arcellina group and is a structural feature that aids in feeding mechanisms.

Explanation

A pylome is specifically related to the Amebozoa; arcellina group and is a structural feature that aids in feeding mechanisms.

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17. Clade:Amitochondria Excavates: Diplimonads and Parabasalids.

Filamentous fungi with chitin cell walls, no flagella, decomposers

Unicellular organisms with cell walls made of silica, 2 flagella, photosynthetic

Multicellular organisms with radial symmetry, no flagella, heterotrophic

Bilaterally Symmetrical Flagellates, 1 to 4 flagella, Mostly parasitic; several nucleus

The correct answer describes the characteristics of organisms in the clade Amitochondria Excavates, which include Diplimonads and Parabasalids. These organisms are bilaterally symmetrical flagellates with 1 to 4 flagella, mostly parasitic, and possess several nuclei.

Explanation

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18. What are some characteristics of the Clade Discicristales: Euglenoids?

No flagella; no chloroplast; no stigma.

Multiple flagella; many chloroplast; no stigma.

Three flagella; one chloroplast; eyespot.

One or two flagella; few of many chloroplast; stigma

The correct answer describes the typical characteristics of Euglenoids belonging to the Clade Discicristales, including the presence of one or two flagella, a few or many chloroplasts, and a stigma.

Explanation

The correct answer describes the typical characteristics of Euglenoids belonging to the Clade Discicristales, including the presence of one or two flagella, a few or many chloroplasts, and a stigma.

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