Which one emits jet of water when disturbed

Options

A. Balanoglossus
B. Herdmania
C. Salpa
D. Branchiostoma

Answer

To answer the question "Which one emits jet of water when disturbed?", we will analyze the options provided and determine which organism has this characteristic.

### Step-by-Step Solution:

1. **Identify the Organisms**: The options given are:
- A) Belanoglossus
- B) Hedmania
- C) Celpa
- D) Branchiostoma

2. **Research Each Organism**:
- **Belanoglossus**: This is a type of hemichordate and does not emit jets of water when disturbed.
- **Hedmania**: This organism is known for its ability to expel a jet of water through its brachial and atrial apertures when disturbed. It is commonly referred to as a sea squirt.
- **Celpa**: This is another organism that does not have the ability to emit water jets.
- **Branchiostoma**: This is a lancelet and also does not emit jets of water.

3. **Determine the Correct Answer**: From the analysis, it is clear that **Hedmania** is the organism that emits a jet of water when disturbed.

4. **Conclusion**: The correct answer to the question is **Hedmania**.

### Final Answer:
The organism that emits a jet of water when disturbed is **Hedmania**.

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