Question

Which of the following algae type is found deep in the sea water?
1. Red algae
2. Brown algae
3. Green algae
4. Golden algae

Answer 1

Correct Answer - Option 1 : Red algae

The correct answer is Red algae.

Concept-

• Algae come under kingdom Plantae.
• Algae is divided into three classes based on the photosynthetic pigments.
• Green Algae or Chlorophyceae- The pigment of green algae is chlorophyll a and b.
• Brown Algae or Phaeophyceae- The pigment of brown algae is chlorophyll a, c and fucoxanthin.
• Red Algae or Rhodophyceae-  The pigment of red algae is chlorophyll a, d and phycoerythrin.

Explanation-

• Red algae found in great depths in oceans where relatively little light penetrates.
• In the depth of the sea, the amount of R - phycoerythrin is more in red algae and because of this pigment, their colour is red.
• Penetration power is maximum in ultraviolet and violet light. R - phycoerythrin is the only pigment to absorb ultraviolet and violet light.
• Due to phycoerythrin red algae are the deepest algae.

• Blue-green algae belong to the kingdom Monera rather than Plantae.