Microorganisms Quiz: Identify Key Microbes

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Quizzes Created: 7682 | Total Attempts: 9,547,133
| Questions: 11 | Updated: Nov 25, 2025
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1. Identify the Organism.

Explanation

The correct answer is Bacteria because they lack membrane-bound organelles and do not have true chromosomes. Fungi, Protozoa, and Plants do not match the description provided in the question.

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About This Quiz
Microorganisms Quiz: Identify Key Microbes - Quiz

This Microorganisms quiz is designed to help students test their understanding of bacteria, algae, protozoa, fungi, and other microscopic life forms. Each question focuses on essential concepts such as cell structure, classification, identifying features, and examples of common microorganisms seen in lab work.


In this quiz on... see moremicroorganisms, you’ll explore key characteristics of microbes, including prokaryotes, unicellular eukaryotes, and simple algae. If you're studying for school, college, or competitive tests, this quiz offers a clear and effective way to assess your understanding of the microscopic world. see less

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2. Identify the Organism.

Explanation

The correct answer is Bacillus sp., which are rod-shaped bacilli. Streptococcus sp. are circular-shaped cocci, Escherichia coli are rod-shaped bacteria, and Aspergillus niger are fungal spores, which are not the correct answers for this question.

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3. Identify the Organism.
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4. Identify the Organism.

Explanation

The correct identification of the organism is mixed cyanobacteria, commonly referred to as blue-green algae. It is important to note that blue-green algae are prokaryotes, not true algae, and exhibit photosynthetic capabilities.

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5. Identify the organism which is a member of Chlorophyta (green algae), has spiral chloroplasts, pyrenoids, and a distinct cell wall.

Explanation

Spirogyra is a type of green algae with spiral chloroplasts, pyrenoids for storing starch, and a distinct cell wall. Euglena is a type of protist with a flagellum for movement, diatom is a type of algae with a silica cell wall, and Plasmodium is a parasitic protist causing malaria.

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6. Identify the Organism.

Explanation

The correct answer Oedogonium is a genus of freshwater alga with specific characteristics, whereas the incorrect answers are different genera of algae with distinct features.

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7. Identify the Organism.

Explanation

Volvox is a unique organism with characteristics of being a colony of cells that work together. Unlike the incorrect answers provided, Volvox is a multicellular organism with specialized cells for reproduction and photosynthesis.

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8. Which organism is described as one of the simplest chlorophytes, unicellular, and bi-flagellated?

Explanation

Chlamydomonas is a unicellular green alga that belongs to the division Chlorophyta. It is characterized by its bi-flagellated structure and simple body organization. Stentor, Paramecium, and Euglena are also unicellular organisms, but they belong to different groups and have different characteristics compared to Chlamydomonas.

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9. Identify the Organism.

Explanation

The correct answer describes the characteristics of Nemalion sp., a type of red algae commonly known as seaweed found in oceans. The incorrect answers refer to a fig tree, a gray wolf, and a domestic cat breed, which are not related to the description provided.

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10. Identify the Organism.

Explanation

The correct answer is Laminaria sp., which is a type of brown algae commonly found in oceans. The other options provided are also types of algae, but they do not match the specific characteristics mentioned in the question.

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11. Identify the Organism: 

Explanation

Diatoms are unicellular algae with a wall of silica, often referred to as microscopically photosynthesizers, and are a primary food source for most marine food chains. They are found in oceans, freshwater, and soil.

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Identify the Organism.
Identify the Organism.
Identify the Organism.
Identify the Organism.
Identify the organism which is a member of Chlorophyta (green algae),...
Identify the Organism.
Identify the Organism.
Which organism is described as one of the simplest chlorophytes,...
Identify the Organism.
Identify the Organism.
Identify the Organism: 
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