Phosphorescence occurs in

Options

A. Salpa
B. Pyrosoma
C. Petromyzon
D. Rana

Answer

**Step-by-Step Solution:**

1. **Understanding Phosphorescence**: Phosphorescence is the phenomenon where certain substances emit light after being energized. This property is often seen in some marine organisms.

2. **Analyzing the Options**: We need to evaluate the given options to determine which organism exhibits phosphorescence.

3. **Option 1 - Salpa**: Salpa are a type of urochordate (neurochordate) found in the ocean. They do not exhibit phosphorescence. Therefore, this option is not correct.

4. **Option 2 - Pyrosoma**: Pyrosoma is another type of urochordate. Unlike Salpa, Pyrosoma is known for its ability to emit light, specifically a blue-green light. This indicates that Pyrosoma does exhibit phosphorescence. This option is likely correct.

5. **Option 3 - Petromyzon**: Petromyzon refers to lampreys, which are jawless fish. They do not show phosphorescence. Thus, this option is also not correct.

6. **Option 4 - Rana**: Rana is a genus that includes frogs. Frogs do not exhibit phosphorescence either. Therefore, this option is incorrect as well.

7. **Conclusion**: After analyzing all the options, the only organism that exhibits phosphorescence is Pyrosoma.

**Final Answer**: The correct answer is **Option 2 - Pyrosoma**.

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