Select the wrong statement

Options

A. Prawn has two pairs of antennae
B. Millepedes have two pairs of appendages in each segment of the body.
C. Nematocysts are characteristic of phylum cnidaria
D. Porifers are exclusively marine.

Answer

To solve the question "Select the wrong statement," we will analyze each of the four statements provided and determine which one is incorrect.

### Step-by-Step Solution:

1. **Analyze Statement 1**: "Prawn has two pairs of antennae."
- Prawns are aquatic arthropods and indeed possess two pairs of antennae. This statement is correct.

2. **Analyze Statement 2**: "Bilipeds have two pairs of appendages in each segment of the body."
- Bilipeds, which refer to millipedes, do have two pairs of appendages per body segment. This statement is also correct.

3. **Analyze Statement 3**: "Nematocyst are characteristics of phylum Nidaria."
- Nematocysts are specialized cells found in members of the phylum Cnidaria (also known as Coelenterata), such as hydras. This statement is correct.

4. **Analyze Statement 4**: "Porifers are exclusively marine."
- Porifers, or sponges, are primarily marine, but there are exceptions, such as the freshwater sponge Euspongia. Therefore, this statement is incorrect because it claims that all porifers are exclusively marine.

### Conclusion:
The wrong statement is Statement 4: "Porifers are exclusively marine."

### Final Answer:
The correct answer is Statement 4.

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