Microbes and Plants: Understanding Viruses
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Questions and Answers

What is a characteristic of viruses according to the text?

  • Require a host to live (correct)
  • Can reproduce asexually
  • Contain a nucleus and organelles
  • Are photosynthetic
  • What contributes to the difficulty of studying virus ecology?

  • Absorption by macroscopic organisms
  • Random contact with host cells (correct)
  • Slow evolution
  • Low mutation rate
  • Which factor leads to the highest infection rate by viruses?

  • High density of host cells (correct)
  • Short survival time outside the host
  • Low density of host cells
  • Presence of UV light
  • What is a characteristic shared by Archaea and Bacteria based on the text?

    <p>Lack organelles</p> Signup and view all the answers

    What is true about Cyanobacteria as discussed in the text?

    <p>They fix nitrogen</p> Signup and view all the answers

    What is the pigment that gives red algae their red color?

    <p>Phycobilin</p> Signup and view all the answers

    Which type of algae is often outcompeted due to its inability to uptake larger amounts of nutrients?

    <p>Golden algae</p> Signup and view all the answers

    What is the main component of phytoplankton in oligotrophic lakes?

    <p>Golden algae</p> Signup and view all the answers

    Which type of algae dominates the benthic zones of lakes, streams, and wetlands?

    <p>Diatoms</p> Signup and view all the answers

    What feature allows Chrysophyceae to move independently of their colony?

    <p>Two flagella</p> Signup and view all the answers

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