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:
This question is important because it tests key concepts from the NCERT syllabus and is frequently asked in CBSE exams.
This question is based on core NCERT concepts explained in the chapter and should be revised thoroughly before exams.
Students often lose marks by skipping steps, writing incomplete explanations, or misunderstanding keywords used in the question.
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...
Step-by-step explanation:
• Algae are classified into three main classes – Chlorophyceae, Phaeophyceae, and Rhodophyceae
• These divisions are based on the following factors:
•
• (a) Major photosynthetic pigments present
•
Stay updated with our latest educational content and study tips
All businesses are gathering information on customers, products, employees, and expenditures, and someone must make decisions based on the data. That individual is the data analyst. Unlike many career changers imagine, the job is open to a broader cross-section of the population than a typical career change. A lot of working analysts trained in commerce, … Read more
Read More
Are often purchased, talked and planned as being a replacement for another. They aren’t. One safeguards your family’s income in your absence and the other safeguards your family’s savings in the event that someone becomes ill. An examination of what they do, what they do not do, and why they are missing it when one … Read more
Read More
Pay upfront, or pay off less and over time? The truth depends on four factors most consumers will never compare at the same time: the interest rate on the house loan, the interest rate on the savings account, the rate of home price appreciation, and the cost of renting the home until you actually buy … Read more
Read More
Thirty is when the question starts to get raised and you’re able to do something because you know you have the experience—you know you have the responsibility. Here are some ways to consider the choice based on a realistic assessment without idealizing either aspect. Restlessness is one of those things that appears in your early … Read more
Read More
Student Discussion
It must be chlorophyll a&d not a&b
ADD NEW COMMENT