Cyanobacteria: Definition and Characteristics
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Questions and Answers

What is the primary role of cyanobacteria in symbiotic relationships with plants?

  • Producing sunlight
  • Enhancing soil fertility
  • Providing carbon dioxide
  • Fixing nitrogen (correct)
  • Which organisms have a symbiotic relationship with cyanobacteria that allows photosynthesis and oxygen production?

  • Plants (correct)
  • Fungi
  • Protists
  • Animals
  • What term is used to describe cyanobacteria when they are present among plant cells?

  • Nucleus
  • Mitochondria
  • Chloroplasts (correct)
  • Ribosomes
  • In what way did cyanobacteria contribute to the evolution of life on Earth 1.5 billion years ago?

    <p>Introducing oxygen into the atmosphere</p> Signup and view all the answers

    What can happen when water is rich in nutrients that cyanobacteria can use to divide and multiply?

    <p>Formation of algae blooms</p> Signup and view all the answers

    What is a potential consequence of toxic cyanobacteria blooms in ecosystems?

    <p>Harm to shellfish and humans</p> Signup and view all the answers

    What is the significance of Microcystis aeruginosa among cyanobacteria examples?

    <p>Formation of freshwater blooms</p> Signup and view all the answers

    What is the primary function of cyanobacteria in symbiotic relationships with plants?

    <p>Fixing nitrogen for plants</p> Signup and view all the answers

    What is the role of cyanobacteria in the process of photosynthesis?

    <p>Converting sunlight and carbon dioxide into energy</p> Signup and view all the answers

    Why are cyanobacteria crucial for the survival of plants and algae?

    <p>To fix nitrogen and provide essential nutrients</p> Signup and view all the answers

    What is a potential consequence of cyanobacteria blooms in both freshwater and saltwater ecosystems?

    <p>Harmful toxins released into the environment</p> Signup and view all the answers

    What distinguishes Microcystis aeruginosa among cyanobacteria examples?

    <p>Formation of toxic blooms in freshwater environments</p> Signup and view all the answers

    Why is Cyanobacteria blooms detrimental to ecosystems?

    <p>They pose a risk due to the release of harmful toxins</p> Signup and view all the answers

    What was the significant contribution of cyanobacteria to Earth's atmosphere?

    <p>First introduction of oxygen through photosynthesis</p> Signup and view all the answers

    How do cyanobacteria contribute to the evolution of all life on Earth 1.5 billion years ago?

    <p>By creating energy from sunlight</p> Signup and view all the answers

    What happens when water is rich in nutrients that cyanobacteria can use to divide and multiply?

    <p>Formation of cyanobacteria blooms due to rapid multiplication</p> Signup and view all the answers

    Why do plants and algae require photosynthetic bacteria like cyanobacteria?

    <p>To create energy necessary for their survival through photosynthesis</p> Signup and view all the answers

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