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Classification of Algae into 11 classes ...

Classification of Algae into 11 classes was made by Fritsch on the basis of flagellation, pigmentation and type of reserve food. Out of this, the main criteria used in algal classification grouping of algae is

A

chemical composition of cell wall

B

type of pigmentation

C

nature of food storage

D

shape and colony formation.

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**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks about the main criteria used by Fritsch for classifying algae into 11 classes. The classification is based on three main factors: flagellation, pigmentation, and type of reserve food. 2. **Identifying the Key Factors**: According to the video transcript, Fritsch's classification includes: - Type of pigmentation - Nature of reserve food - Mode of nutrition 3. **Exploring Pigmentation**: The transcript explains that algae can be classified based on their pigmentation into three main groups: - **Chlorophyceae** (Green algae) - Contains chlorophyll A - **Phaeophyceae** (Brown algae) - Contains chlorophyll A, C, and fucoxanthin - **Rhodophyceae** (Red algae) - Contains chlorophyll A, D, and phycoerythrin 4. **Analyzing the Options**: The options given in the question are: - A) Chemical composition - B) Type of pigmentation - C) Nature of food storage - D) Shape and colony formation 5. **Determining the Main Criteria**: The transcript indicates that the primary classification criterion used by Fritsch is the type of pigmentation. While other factors like chemical composition and nature of food storage are considered, pigmentation is emphasized as the main criterion. 6. **Conclusion**: Therefore, the main criteria used in the classification of algae by Fritsch is **Type of Pigmentation**. **Final Answer**: The main criteria used in algal classification grouping of algae is **Type of Pigmentation** (Option B). ---
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