From the following statements select the wrong one

Options

A. Millipedes have two pairs of appendages in each segment of the body
B. Prawn has two pairs of antennae
C. Animals belonging to phylum-Porifera are exclusively marine
D. Nematocysts are characteristic of the phylum-Cnidaria

Explanation

To solve the question, we need to analyze the statements provided and identify which one is incorrect. Here's a step-by-step breakdown:

### Step 1: Analyze the first statement
- **Statement**: "Millipedes have two pairs of appendages in each segment of the body."
- **Analysis**: This statement is true. Millipedes are known for having two pairs of legs (appendages) per body segment.

### Step 2: Analyze the second statement
- **Statement**: "Prawn has two pairs of antennae."
- **Analysis**: This statement is also true. Prawns, which belong to the class Malacostraca, do indeed have two pairs of antennae.

### Step 3: Analyze the third statement
- **Statement**: "Animals belonging to the phylum Porifera are exclusively marine."
- **Analysis**: This statement is incorrect. While the majority of sponges (phylum Porifera) are marine, there are also freshwater species. Specifically, the family Spongillidae contains freshwater sponges.

### Step 4: Analyze the fourth statement
- **Statement**: "Nematocysts are characteristics of phylum Cnidaria."
- **Analysis**: This statement is true. Nematocysts are specialized cells found in organisms of the phylum Cnidaria, such as jellyfish and corals.

### Conclusion
- The wrong statement among the options is the third one: "Animals belonging to the phylum Porifera are exclusively marine."

### Final Answer
The incorrect statement is: "Animals belonging to the phylum Porifera are exclusively marine."

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