The Question is from neet-botany plant-kingdom , and it was created by the author NISHANTH

Question

Which algal group is characterized by the presence of mannitol as the reserve food material?

NISHANTH · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
 **Primary Concept**: Algal Classification and Storage Products
 **Related Topics**:  Photosynthesis, Carbohydrate Metabolism in Algae
 **Prerequisites**: Basic knowledge of different algal groups (Chlorophyceae, Rhodophyceae, Phaeophyceae, Cyanophyceae) and their characteristics.
## SOLUTION PATHWAY
**Given Information**:
The question asks to identify the algal group that stores mannitol as its reserve food material.
**Method & Steps**:
1. Identify the characteristics of each algal group.
Chlorophyceae (green algae) store starch as their primary reserve food.
Rhodophyceae (red algae) store floridean starch.
 Phaeophyceae (brown algae) store laminarin and mannitol.
Cyanophyceae (blue-green algae) store cyanophycean starch.
2. Compare the given options with the known characteristics of each algal group.
3. Identify the algal group that stores mannitol.
   The Phaeophyceae (brown algae) are characterized by the presence of mannitol as their reserve food material, along with laminarin.
**Result**: Phaeophyceae (Option C)
**Verification**:  The information about the storage products of different algal groups is consistent with established biological knowledge.
## OPTION ANALYSIS
A :x: Chlorophyceae store starch, not mannitol.
B :x: Rhodophyceae store floridean starch, not mannitol.
C ✓: Phaeophyceae store mannitol and laminarin. This is the correct answer.
D :x: Cyanophyceae store cyanophycean starch, not mannitol.
## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the storage products of different algal groups: Memorizing the specific storage products for each group is crucial to avoid errors.
  2.Overlooking the presence of multiple storage products in some groups: Some algae store more than one type of carbohydrate; considering only one might lead to incorrect conclusions.
 **Quick Tips**:
  1.Create a table summarizing the storage products of different algal groups for easy comparison and memorization.
  2.Use mnemonics or other memory aids to associate each algal group with its primary storage product.

NISHANTH · Answer

Chlorophyceae

NISHANTH · Answer

Rhodophyceae

NISHANTH · Answer

The correct Option is "Phaeophyceae"

NISHANTH · Answer

Cyanophyceae

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