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Read the following statements :- (A) The...

Read the following statements :- (A) The vegetative cells have a cellulosic wall usually covered by coating of algin
(B) Vegetative reproduction takes place by fragmentation
(C) Sexual reproduction may be isogamous, anisogamous or oogamous
(D) The gametes are pyriform (Pear shaped) and bear two laterally attached unequal flagella Which algal group represents these characteristics ?

A

Chlorophyceae

B

Phaeophyceae

C

Rhodophyceae

D

Xanthophyceae

Text Solution

AI Generated Solution

The correct Answer is:
To determine which algal group represents the given characteristics, let's analyze each statement step by step: ### Step 1: Analyze Statement A **Statement A:** "The vegetative cells have a cellulosic wall usually covered by a coating of algin." - **Explanation:** This indicates that the algal group has a cell wall made of cellulose, which is a common feature in many algae, particularly in the group known as brown algae (Phaeophyceae). The presence of algin, a polysaccharide, is also characteristic of brown algae. ### Step 2: Analyze Statement B **Statement B:** "Vegetative reproduction takes place by fragmentation." - **Explanation:** Fragmentation is a common method of vegetative reproduction in many algae, including brown algae. This means that when a part of the plant breaks off, it can grow into a new individual. ### Step 3: Analyze Statement C **Statement C:** "Sexual reproduction may be isogamous, anisogamous, or oogamous." - **Explanation:** This statement indicates that the algal group can reproduce sexually in three different ways: - **Isogamous:** where gametes are of similar size. - **Anisogamous:** where gametes are of different sizes. - **Oogamous:** where there is a large non-motile egg and smaller motile sperm. - Brown algae can exhibit all three types of sexual reproduction. ### Step 4: Analyze Statement D **Statement D:** "The gametes are pyriform (pear-shaped) and bear two laterally attached unequal flagella." - **Explanation:** This description of the gametes suggests that they have a specific shape (pear-shaped) and possess two flagella of unequal lengths. This is characteristic of the gametes found in certain groups of brown algae. ### Conclusion Based on the analysis of all four statements, the algal group that represents these characteristics is **Phaeophyceae (Brown Algae)**. ### Final Answer The algal group that represents these characteristics is **Phaeophyceae (Brown Algae)**. ---
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