Algae Classification
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Questions and Answers

What is the primary mode of reproduction of Euglenophytes under favorable conditions?

  • Binary fission
  • Palmella stage
  • Cyst formation
  • Longitudinal cell division (correct)
  • What is the function of stigma in Euglenophytes?

  • To aid in movement (correct)
  • To detect light intensity
  • To sense organic matter
  • To regulate temperature
  • Why are Euglenophytes used as indicators of water pollution?

  • They are aquatic animals
  • They thrive in polluted waters
  • They are sensitive to organic matter (correct)
  • They are resistant to pollutants
  • What is the term for Euglenophytes that have photosynthetic pigments but can also behave as heterotrophs?

    <p>Facultative heterotrophs</p> Signup and view all the answers

    What is the purpose of contractile vacuoles in Euglenophytes?

    <p>To discharge cellular excretions</p> Signup and view all the answers

    Under what conditions do Euglenophytes form palmella stages?

    <p>Under unfavorable environmental conditions</p> Signup and view all the answers

    What happens to the parental cell during the Palmella stage?

    <p>It becomes dormant till conditions become suitable</p> Signup and view all the answers

    What is the characteristic feature of Euglena?

    <p>It has a green chloroplast and a single flagellum</p> Signup and view all the answers

    What is the purpose of cyst formation in these algae?

    <p>To form a thick-walled protective structure</p> Signup and view all the answers

    How do Euglena cells typically divide?

    <p>By longitudinal division</p> Signup and view all the answers

    What is the characteristic feature of Phacus?

    <p>It is flattened like a leaf with a pointed tail</p> Signup and view all the answers

    What happens to the daughter protoplasts in some cases?

    <p>They do not escape and are surrounded by a gelatinous sheath</p> Signup and view all the answers

    How long can Phacus grow up to?

    <p>Up to 100 um</p> Signup and view all the answers

    What is the habitat of Phacus?

    <p>Similar to Euglena</p> Signup and view all the answers

    Who was the first person to use the term 'Algae'?

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

    Which criterion is used to classify algae based on the morphology and orientation of flagella?

    <p>Motile reproduction bodies</p> Signup and view all the answers

    What suffix is recommended for the family level in algae classification?

    <p>-aceae</p> Signup and view all the answers

    Which division of algae is known for lacking a cell wall but has a hard outer layer called a pellicle?

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

    What is the difference between paramylon and starch?

    <p>Paramylon does not react with iodine</p> Signup and view all the answers

    Which of the following is a key feature of Euglenophyta?

    <p>Presence of paramylon bodies</p> Signup and view all the answers

    What movement is characteristic of Euglenophyta due to their striae?

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

    Which main pigment do Euglenophyta contain?

    <p>Chlorophyll a</p> Signup and view all the answers

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