Bacteria Unveiled
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Questions and Answers

Which of the following statements about bacteria is true?

  • Bacteria are responsible for the decomposition of dead bodies. (correct)
  • Bacteria cannot survive in extreme environments.
  • Bacteria are eukaryotic microorganisms.
  • Bacteria are only found in water habitats.
  • What is the size range of bacteria?

  • Micrometres to millimetres
  • Nanometres to micrometres (correct)
  • Millimetres to centimetres
  • Centimetres to metres
  • Where can bacteria be found?

  • In various habitats such as soil, water, and hot springs (correct)
  • Only in soil and water
  • Only in radioactive waste
  • Only in the deep biosphere of Earth's crust
  • What is the role of extremophile bacteria in hydrothermal vents and cold seeps?

    <p>They convert dissolved compounds to energy.</p> Signup and view all the answers

    What type of relationship can bacteria have with plants?

    <p>Both symbiotic and parasitic</p> Signup and view all the answers

    What is the significance of bacteria in the nutrient cycle?

    <p>Bacteria play a vital role in many stages of the nutrient cycle by recycling nutrients and fixing nitrogen from the atmosphere.</p> Signup and view all the answers

    How do extremophile bacteria contribute to sustaining life in hydrothermal vents and cold seeps?

    <p>Extremophile bacteria provide the nutrients needed to sustain life by converting dissolved compounds, such as hydrogen sulphide and methane, to energy.</p> Signup and view all the answers

    What is the main characteristic of bacteria?

    <p>Bacteria are mostly free-living organisms consisting of one biological cell.</p> Signup and view all the answers

    Where can bacteria be found in Earth's habitats?

    <p>Bacteria can be found in soil, water, acidic hot springs, radioactive waste, and the deep biosphere of Earth's crust.</p> Signup and view all the answers

    What is the role of bacteria in the decomposition process?

    <p>Bacteria are responsible for the putrefaction stage in the decomposition of dead bodies.</p> Signup and view all the answers

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