Algae: Form and Habitats
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Questions and Answers

What is the primary role of algae in the ecosystem?

  • Breaking down energy-rich compounds
  • Producing oxygen through photosynthesis (correct)
  • Regulating the water temperature in aquatic environments
  • Providing shelter for aquatic animals
  • Which of the following is a commercial use of marine algae?

  • Manufacturing of synthetic fibers
  • Generation of electricity through bioreactors
  • Extraction of rare minerals for industrial use
  • Production of hydrocolloids like algin and carrageen (correct)
  • What is the main function of agar obtained from Gelidium and Gracilaria?

  • Growing microbes and preparing ice-creams and jellies (correct)
  • Serving as a source of biofuels
  • Providing structural support to marine ecosystems
  • Enhancing the color of food products
  • Which class do algae like Chlorella belong to?

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

    What is the significance of marine brown and red algae in the industry?

    <p>Production of hydrocolloids like algin and carrageen</p> Signup and view all the answers

    What is the role of algae in carbon dioxide fixation on earth?

    <p>Contribute at least half of the total carbon dioxide fixation through photosynthesis</p> Signup and view all the answers

    Which type of reproduction is characterized by fusion of two gametes, one large and non-motile female gamete, and a smaller, motile male gamete?

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

    What is the most common method of asexual reproduction in algae?

    <p>Production of zoospores</p> Signup and view all the answers

    Which type of algae form massive plant bodies in marine environments?

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

    What is the size range of algae?

    <p>Microscopic unicellular to colonial forms</p> Signup and view all the answers

    Which type of algae reproduction involves fusion of two gametes that are similar in size and can be flagellated or non-flagellated?

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

    Where do algae largely occur?

    <p>Moist stones, soils, and wood</p> Signup and view all the answers

    Which type of algae reproduction involves fusion of two gametes, one large and non-motile female gamete, and a smaller, motile male gamete?

    <p>Oogamous reproduction</p> Signup and view all the answers

    What is the term for the most common method of Vegetative reproduction in algae?

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

    In algae, what is the primary function of agar obtained from Gelidium and Gracilaria?

    <p>Asexual reproduction</p> Signup and view all the answers

    What is the significance of marine brown and red algae in the industry?

    <p>Food coloring</p> Signup and view all the answers

    Where do algae largely occur?

    <p>Mainly in aquatic habitats (both fresh water and marine), moist stones, soils, and wood</p> Signup and view all the answers

    What is the primary role of algae in the carbon cycle?

    <p>Fixing carbon dioxide through photosynthesis</p> Signup and view all the answers

    Which algae species are commonly used as food?

    <p>Porphyra, Laminaria, and Sargassum</p> Signup and view all the answers

    What is the commercial application of carrageen obtained from red algae?

    <p>Utilized in preparations of ice-creams and jellies</p> Signup and view all the answers

    Which class of algae does Chlorella belong to?

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

    What is the significance of algin obtained from brown algae?

    <p>Used to grow microbes</p> Signup and view all the answers

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