Question

what is the basis of classification of alegi​

Answer 1

Algae are classified into three main classes – Chlorophyceae, Phaeophyceae, and Rhodophyceae. These divisions are based on the following factors:

(a) Major photosynthetic pigments present

(b) Form of stored food  

(c) Cell wall composition  

(d) Number of flagella and position of insertion

Class I – Chlorophyceae  

Common name – Green algae

Major pigments – Chlorophylls a and b  

Stored food – Starch

Cell wall composition – Cellulose

Flagella number and position – 28; equal and apical

Class II – Phaeophyceae  

Common name– Brown algae

Major pigments – Chlorophylls a and c, and fucoxanthin

Stored food – Mannitol and laminarin

Cell wall composition – Cellulose and algin  

Flagella number and position – 2; unequal and lateral  

Class III – Rhodophyceae  

Common name – Red algae

Major pigments – Chlorophylls a and b, and phycoerythrin  

Stored food – Floridean starch  

Cell wall – Cellulose, pectin, and polysulphate esters

Answer 2

Answer:

The presence or absence of pigments is the mainbasis of classification of algae.

Chlorophyceae: Chlorophyll a and b.