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 (B)</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 (D)</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 (D)</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 (B)</p> Signup and view all the answers

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

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

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

<p>Kelps (C)</p> Signup and view all the answers

What is the size range of algae?

<p>Microscopic unicellular to colonial forms (D)</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 (A)</p> Signup and view all the answers

Where do algae largely occur?

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

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

<p>Fragmentation (C)</p> Signup and view all the answers

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

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

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

<p>Food coloring (C)</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 (A)</p> Signup and view all the answers

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

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

Which algae species are commonly used as food?

<p>Porphyra, Laminaria, and Sargassum (A)</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 (D)</p> Signup and view all the answers

Which class of algae does Chlorella belong to?

<p>Chlorophyceae (C)</p> Signup and view all the answers

What is the significance of algin obtained from brown algae?

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

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