Lab Exam 1: Algae and Bacteria
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Questions and Answers

Which of the following organisms are classified as green algae?

  • Volvox (correct)
  • Spirogyra (correct)
  • Chlamydomonas (correct)
  • Laminaria

    • Which organism is commonly known as 'sea lettuce'?

  • Chlamydomonas
  • Spirogyra
  • Ulva (correct)
  • Laminaria

    • Which organism is commonly known as 'kelp'?

  • Volvox
  • Spirogyra
  • Laminaria (correct)
  • Chlamydomonas

    • Which of the following is NOT a characteristic of brown algae?

    <p>They are found in freshwater environments. (C)</p> Signup and view all the answers

    Which organism is NOT classified as algae?

    <p>ficus (A)</p> Signup and view all the answers

    Which of the following organisms is classified as a prokaryote?

    <p>Anabaena (A)</p> Signup and view all the answers

    Which of the following characteristics distinguishes the protists from the other groups mentioned in the text?

    <p>They are all eukaryotic. (C)</p> Signup and view all the answers

    What is the primary function of heterocysts in cyanobacteria?

    <p>Nitrogen fixation (B)</p> Signup and view all the answers

    Which of the following organisms is responsible for causing malaria?

    <p>Plasmodium (D)</p> Signup and view all the answers

    Which of the following accurately describes the mode of nutrition for Euglena?

    <p>Mixotrophic (A)</p> Signup and view all the answers

    What is the distinctive feature of diatoms that sets them apart from other algae?

    <p>Their outer shell made of silica (C)</p> Signup and view all the answers

    Which of the following algae is most likely to be found in freshwater habitats?

    <p>Spirogyra (B)</p> Signup and view all the answers

    Which of the following is a characteristic shared by both Volvox and Spirogyra?

    <p>They are both photosynthetic. (C)</p> Signup and view all the answers

    Which of the following best describes the relationship between the organism causing sleeping sickness and the organism causing Chagas disease?

    <p>They are both parasitic protists. (B)</p> Signup and view all the answers

    Which of the following organisms is most closely related to the amoeba?

    <p>Foraminifera (A)</p> Signup and view all the answers

    Flashcards

    Brown Algae

    A group of algae that are primarily marine and include species like kelp.

    Green Algae

    A diverse group of photosynthetic organisms found in various aquatic environments.

    Chlamydomonas

    A unicellular green alga that is often used in biological studies.

    Ulva (Sea Lettuce)

    A green algae known for its broad, leafy fronds, often found in coastal areas.

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    Laminaria (Kelp)

    A genus of large brown algae that forms underwater forests, crucial for marine ecosystems.

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    Cyanobacteria

    Photosynthetic bacteria often found in aquatic environments, capable of nitrogen fixation.

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    Anabaena

    A genus of cyanobacteria known for nitrogen-fixing abilities and forming symbiotic relationships with plants.

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    Plasmodium

    A genus of protists responsible for malaria; transmitted by mosquitoes.

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    Trypanosoma

    A genus of protists that causes sleeping sickness and Chagas disease, transmitted by insects.

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    Diatoms

    Microscopic algae with silica outer shells, important in aquatic ecosystems and food chains.

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    Heterocysts

    Special cells in cyanobacteria that facilitate nitrogen fixation.

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    Euglena

    A mixotrophic protist that can photosynthesize or consume food, found in fresh water.

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    Foraminifera

    Amorphous protists with calcium carbonate shells, often found in ocean sediment.

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    Sargassum

    Brown algae that form floating masses in ocean water, providing habitat.

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    Vorticella

    A ciliated protist that is often immobile and attaches to substrates in water.

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    Study Notes

    LAB EXAM 1: Algae and Bacteria

    • Green Algae: Includes Chlamydomonas, Spirogyra, Cladophora, Volvox, Ulva (sea lettuce), and Chara (stonewort). Found in jars.

    • Brown Algae: Includes Fucus vesiculosus (leekweed), Laminaria (kelp), and Sargassum (Gulf weed). Differentiated from other algae by their brown pigment.

    • Red Algae: Includes Polysiphonia. Have red pigments.

    • Cyanobacteria: Examples include Nostoc, Anabaena, and Oscillatoria. Classified as bacteria, known for photosynthesis .

    • Protists: A diverse group including Euglena, Paramecium, Amoeba, Diatoms, and Dinoflagellates. Some are photosynthetic, some are heterotrophic.

    Disk Diffusion Test

    • Used to evaluate antibacterial activity.
    • Larger zone of inhibition indicates effectiveness of antibiotic.
    • Three bacteria types (Bacillus-rod, Coccus-spherical, Spirillum-spiral) are impacted by antibacterial agents

    Cyanobacteria Details

    • Nostoc: Heterocysts inside do nitrogen fixation. Vegetative cells photosynthesize.

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    Lab Exam 1 Cram PDF

    Description

    Test your knowledge on algae and bacteria in this lab exam. Topics include green, brown, and red algae, as well as cyanobacteria and protists. Evaluate your understanding of the disk diffusion test and its significance in antibacterial activity.

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