Academic session 2026-27, Chapter 3 in the current curriculum.
Welcome to the NCERT Solutions for Class 11 Biology - Chapter Plant Kingdom. This page offers a step-by-step solution to the specific question from Exercise 1, Question 1: What is the basis of classification of algae?. With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.
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
Flagella number – Absent
NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:
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Welcome to the NCERT Solutions for Class 11 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 1: What is the basis of classification of algae?....
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Comments
Woow nice answer anyway is it correct?
Yes you are right
Major pigment of red is wrong It must be chlorophyll a&d not a&b