Lichens

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| By Mpridemore14
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Mpridemore14
Community Contributor
Quizzes Created: 8 | Total Attempts: 21,650
| Attempts: 880
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  • 1/11 questions

    Lichens are a relationship between an "algae" and a "fungus". The "algae" is usually a green algae or cyanobacteria

    • True
    • False
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Lichens - Quiz

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  • 2. 

    The algae provides ______?

    • Food

    • Water

    • Protection

    Correct Answer
    A. Food
    Explanation
    Through photosynthesis

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  • 3. 

    Identification is usually based on the _____?

    • Fungus

    • Algae

    Correct Answer
    A. Fungus
    Explanation
    Identification is usually based on the fungus. This suggests that when it comes to identifying something, such as a species or a sample, the presence or characteristics of a fungus are often used as key indicators. Fungi have distinct features and can be easily observed and analyzed, making them a reliable basis for identification purposes. Algae, on the other hand, may also be used for identification in certain cases, but the question implies that fungus is the more commonly relied upon factor.

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  • 4. 

    Lichens are not sensitive to sulfur dioxide 

    • True

    • False

    Correct Answer
    A. False
    Explanation
    They are very sensitive

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  • 5. 

    The "algae" and the fungi are associated together in what is called a spongy thallus

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The statement is true because algae and fungi are often found together in a symbiotic relationship known as a spongy thallus. In this relationship, the algae provide food through photosynthesis, while the fungi provide a protective structure and absorb nutrients from the environment. This association allows both organisms to benefit and thrive in their respective habitats.

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  • 6. 

    Fungus provides ______ ?

    • Food

    • Water

    • Protection

    Correct Answer
    A. Protection
    Explanation
    Provides protection from harmful light intensities and absorbs nutrients and water
    Fungus is usually from the Phylum Ascomycota

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  • 7. 

    Lichens are assigned to a taxonomic group 

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Lichens are NOT assigned to a taxonomic group because two different organisms are involved

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  • 8. 

    Which lichen is used by model railroad builders and is usually fed on by Caribou and Reindeer 

    • Crustose

    • Foliose

    • Fruticose

    Correct Answer
    A. Fruticose
    Explanation
    Fruticose lichen is used by model railroad builders and is usually fed on by Caribou and Reindeer.

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  • 9. 

    Crustose lichens....

    • Look like miniature shrubs and are usually branched

    • Attached to or embedded in the substrate over the entire lower surface

    • They often form brightly colored patches on bare rocks and tree bark

    • Weakly attached to the substrate

    • The thalli are somewhat leaflike

    • Attached to the substrate at one point

    Correct Answer(s)
    A. Attached to or embedded in the substrate over the entire lower surface
    A. They often form brightly colored patches on bare rocks and tree bark
    Explanation
    Crustose lichens are attached to or embedded in the substrate over the entire lower surface. This means that they are firmly attached to the surface they grow on and cannot be easily detached. They often form brightly colored patches on bare rocks and tree bark, which is a characteristic feature of crustose lichens. This attachment allows them to withstand harsh environmental conditions and provides them with a stable base for growth. Additionally, the fact that they are weakly attached to the substrate suggests that they are not firmly rooted and can be easily detached.

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  • 10. 

    Fruitcose lichens...

    • Attached in the substrate over the entire lower surface

    • Often form brightly colored patches on bare rocks and tree bark

    • The thalli are somewhat leaflike

    • Weakly attached to the substrate

    • Looks like miniature shrubs and are usually branched

    • Attached to the substrate at one point

    Correct Answer(s)
    A. Looks like miniature shrubs and are usually branched
    A. Attached to the substrate at one point
    Explanation
    The correct answer states that fruitcose lichens look like miniature shrubs and are usually branched. Additionally, they are attached to the substrate at one point. This means that the lichens have a shrub-like appearance with branches, and they are connected to the substrate at a single point.

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  • 11. 

    Foliose lichens...

    • Weakly attached to the substrate

    • Attached to in the substrate over the entire lower surface

    • Looks like miniature shrubs and are usually branched

    • The thalli are somewhat leaflike

    • Form brightly colored patches on bare rocks and tree bark

    • Attached to the substrate at one point

    Correct Answer(s)
    A. Weakly attached to the substrate
    A. The thalli are somewhat leaflike
    Explanation
    Foliose lichens are weakly attached to the substrate and have thalli that are somewhat leaflike in appearance. This means that they are not firmly attached to the surface they grow on and can be easily detached. The thalli, or the leaf-like structures of the lichens, have a similar appearance to leaves, with a flat and lobed shape. This combination of weak attachment and leaf-like thalli helps to distinguish foliose lichens from other types of lichens.

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Quiz Review Timeline (Updated): Mar 21, 2023 +

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Apr 18, 2011
    Quiz Created by
    Mpridemore14
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