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Algae have unique characters like...

Algae have unique characters like

A

(a) thalloid plant body

B

(b) phycobilins

C

(c) unicellular sex organs

D

(d) mechanical tissue.

Text Solution

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The correct Answer is:
### Step-by-Step Solution 1. **Understanding Algae**: Algae are simple, autotrophic organisms that belong to the plant kingdom. They are primarily aquatic and can be found in both freshwater and marine environments. 2. **Identifying Unique Characteristics**: The question asks for unique characteristics of algae. We need to analyze the options provided to find which one is specific to algae. 3. **Evaluating Options**: - **Option 1: Phthalophyta**: Algae are classified under the phylum Thallophyta. This is a unique characteristic because algae do not have a well-defined body structure like roots, stems, or leaves. Instead, they have a thalloid plant body, which is a significant distinguishing feature. - **Option 2: Phycobolins**: Phycobolins are pigments found in cyanobacteria (blue-green algae), which belong to the kingdom Monera, not Thallophyta. Therefore, this is not a unique feature of algae. - **Option 3: Unicellular Sex Organs**: While some algae may have unicellular sex organs, this characteristic is also found in other plant groups like Bryophyta and Pteridophyta. Thus, it is not unique to algae. - **Option 4: Mechanical Tissue**: Mechanical tissues provide structural support and are present in all plant groups. Therefore, this is also not a unique feature of algae. 4. **Conclusion**: After analyzing all the options, the unique characteristic of algae is their thalloid plant body structure, which is specific to the phylum Thallophyta. Thus, the correct answer is the first option. ### Final Answer The unique character of algae is their **thalloid plant body**.
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