Question

Difference between Chlorophyceae, Phaeophyceae and Rhodophyceae .​

Answer 1

Chlorophyceae

The key difference between Chlorophyceae Phaeophyceae and Rhodophyceae is that Chlorophyceae is a class of green algae while Phaeophyceae is a class of brown algae and Rhodophyceae is a class of red algae. ... Though algae are usually green, there are different coloured algae as well.

Phaeophyceae

The brown algae, comprising the class Phaeophyceae, are a large group of multicellular algae, including many seaweeds located in colder waters within the Northern Hemisphere. Most brown algae live in marine environments, where they play an important role both as food and as a potential habitat.

Rhodophyceae

Description of Rhodophyceae (Red Algae):

It is a large group of algae consisting of about 831 genera and over 5;250 species. They are commonly known as red algae due to the presence of a water soluble red pigment,

The key difference between Chlorophyceae Phaeophyceae and Rhodophyceae is that Chlorophyceae is a class of green algae while Phaeophyceae is a class of brown algae and Rhodophyceae is a class of red algae. Algae are a photosynthetic eukaryotic aquatic group of organisms. They are found in fresh and seawater.

Answer 2

The difference between Chlorophyceae, Phaeophyceae, and Rhodophyceae are as follows:

(i)

• The members of Rhodophyceae are called red algae.
• The members of Phaeophyceae are called brown algae
• The members of Chlorophyceae are called green algae.

(ii)

• Red algae are found in warmer waters.
• Brown algae are found in cooler seas.
• Green algae are found in freshwater.

(iii)

• The cell wall of red algae consists of cellulose, pectin, and some mucopolysaccharides, called phycocolloids.
• The cell wall of brown algae is double layered. The inner layer is made up of cellulose. The outer layer is thick and mucilaginous. It is formed of phycocolloids.
• The cell wall of green algae consists of cellulose.

(iv)

• Sexual reproduction in red algae is oogamous type.

• Sexual reproduction in brown algae may be of isogamous, anisogamous, or oogamous type.

• Sexual reproduction in green algae may be of isogamous, anisogamous, or oogamous type.