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In respect of classification of algae, the members of Phaeophyceae are commonly called:
1. red algae
2. white algae
3. green algae
4. brown algae

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Correct Answer - Option 4 : brown algae

The Correct Answer is brown algae.

 

  • Algae can be classified on the basis of pigments present in them.
    • Chlorophyceae – green algae
    • Phaeophyceae – brown algae
    • Rhodophyceae – red algae

 

  • Brown algae is a  class of about 1,500 species of algae in the division Chromophyta, common in cold waters along continental coasts.
  • Brown algae are an important source of algin, a colloidal gel used as a stabilizer in the baking and ice-cream industries.

 

  • Red algae are red because of the presence of the pigment phycoerythrin; this pigment reflects red light and absorbs blue light.
  • They are found in water bodies.
  • Green algae have chloroplasts that contain chlorophyll a and b, giving them a bright green colour.
  • The cell walls of green algae usually contain cellulose, and they store carbohydrates in the form of starch.

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