Question

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

Answer 1

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.