You are given free-floating , bright green, silky mass from the surface of fresh water pond Study it under the microscope and identify it. Also classify it.

Answer

**Step-by-Step Solution:**

1. **Observation of the Sample**: Begin by examining the free-floating, bright green, silky mass collected from the surface of the freshwater pond under a microscope. Look for specific characteristics such as color, texture, and structure.

2. **Identification of the Organism**: Based on the observation, identify the organism. The bright green color and silky texture suggest that it is likely a type of algae.

3. **Specific Identification**: Upon closer examination, you may recognize the structure of the organism as resembling Spirogyra. Spirogyra is known for its filamentous structure and green color, which is due to the presence of chlorophyll.

4. **Classification of Spirogyra**: Now classify the identified organism. Spirogyra can be classified as follows:
- **Kingdom**: Plantae
- **Division**: Thalophyta
- **Sub-division**: Cryptogams (which are plants that reproduce by spores rather than seeds)

5. **Conclusion**: Conclude that the free-floating, bright green, silky mass is identified as Spirogyra, and it belongs to the kingdom Plantae, division Thalophyta, and is a member of the cryptogams.

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