Form the following statements, selected the wrong one .

Options

A. Nematocysts are characteristic of the phylum cnidaria
B. Millepedes have two pairs of appendages in each segment of the body
C. Animals belonging to phylum porifera are marine and fresh water .
D. Prawn has two pairs of antenna

Answer

To solve the question of identifying the wrong statement among the provided options, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Identify the Statements**:
We have four statements to analyze:
- Statement 1: Nematocysts are characteristic of the phylum Cnidaria.
- Statement 2: Millipedes have two pairs of appendages in each segment of the body.
- Statement 3: Animals belonging to the phylum Porifera are marine and freshwater.
- Statement 4: Prawn has two pairs of antennae.

2. **Evaluate Statement 1**:
- Nematocysts are indeed characteristic of the phylum Cnidaria (not Nighterea). They are specialized cells used for capturing prey.
- **Conclusion**: This statement is correct.

3. **Evaluate Statement 2**:
- Millipedes (Class Diplopoda) do have two pairs of legs per body segment.
- **Conclusion**: This statement is correct.

4. **Evaluate Statement 3**:
- Animals in the phylum Porifera (sponges) can be found in both marine and freshwater environments.
- **Conclusion**: This statement is correct.

5. **Evaluate Statement 4**:
- Prawns (which belong to the class Malacostraca) actually have one pair of long antennae and one pair of shorter antennules, not two pairs of antennae.
- **Conclusion**: This statement is incorrect.

### Final Answer:
The wrong statement is **Statement 4**: "Prawn has two pairs of antennae."

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