Red Algae: Ancient Eukaryotic Algae
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Questions and Answers

What is the primary habitat of red algae?

  • Freshwater
  • Cave environments
  • Marine (correct)
  • Terrestrial
  • Which class contains the majority of red algae species?

  • Chlorophyceae
  • Florideophyceae (correct)
  • Euglenophyceae
  • Cyanidiophyceae
  • What is the characteristic pigment that gives red algae their color?

  • Carotenoids
  • Phycobiliproteins (correct)
  • Chlorophyll
  • Anthocyanins
  • Why are red algae relatively rare in freshwater environments?

    <p>Greater concentrations found in warmer areas</p> Signup and view all the answers

    What is a distinctive feature of red algae cells?

    <p>Flagella and centrioles</p> Signup and view all the answers

    Why are there no terrestrial red algae species?

    <p>Evolutionary bottleneck resulting in loss of core genes</p> Signup and view all the answers

    What type of starch do red algae store outside the chloroplasts?

    <p>Floridean starch</p> Signup and view all the answers

    Which evolutionary event led to the origin of red and green algae?

    <p>Primary endosymbiosis</p> Signup and view all the answers

    Where are the Cyanidiophyceae, a class of unicellular and thermoacidophilic extremophiles, found?

    <p>Sulphuric hot springs and other acidic environments</p> Signup and view all the answers

    What did the secondary endosymbiosis event involving an ancestral red alga and a heterotrophic eukaryote result in?

    <p>Evolution of several other photosynthetic lineages</p> Signup and view all the answers

    Which clade includes macroalgae, seaweed that usually do not grow to more than about 50 cm in length?

    <p>BF clade</p> Signup and view all the answers

    What adaptation has made the survival of Cyanidiophyceae in sulphuric hot springs and other acidic environments possible?

    <p>Horizontal gene transfers from prokaryotes</p> Signup and view all the answers

    Where are most rhodophytes (red algae) found?

    <p>Marine environments with worldwide distribution</p> Signup and view all the answers

    What type of food product is made from red algae species Porphyra?

    <p>All of the above</p> Signup and view all the answers

    What makes red algae different from green algae in terms of sugar storage?

    <p>Red algae store floridean starch inside the chloroplasts.</p> Signup and view all the answers

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