All of the following statements are correct for poriferans, except

Options

A. Eggs and sperms are produced by the same individual
B. They are generally marine and mostly
C. asymmetrical animals
D. They reproduce sexually as well as asexually

Explanation

To solve the question regarding the statements about poriferans (sponges), we will analyze each statement one by one to determine which one is incorrect.

### Step-by-Step Solution:

1. **Understanding Poriferans**:
- Poriferans, commonly known as sponges, are simple multicellular organisms that belong to the phylum Porifera. They are primarily aquatic and are known for their porous bodies.

2. **Analyzing the Statements**:
- **Statement 1**: "Eggs and sperms are produced by the same individual."
- This statement suggests that all sponges are hermaphroditic (bisexual), producing both eggs and sperm. However, while many sponges are hermaphroditic, some species are unisexual (producing only one type of gamete). Therefore, this statement is not universally true.

- **Statement 2**: "They are generally marine."
- This statement is correct as most sponges are found in marine environments, although some can be found in freshwater.

- **Statement 3**: "They are mostly asymmetric animals."
- This statement is also correct. Sponges do not have a defined symmetry and are generally considered asymmetrical.

- **Statement 4**: "They reproduce sexually as well as asexually."
- This statement is correct. Sponges can reproduce both sexually (through gametes) and asexually (through budding or fragmentation).

3. **Identifying the Exception**:
- After analyzing all statements, we find that the first statement about eggs and sperms being produced by the same individual is not universally applicable to all sponges, making it the exception.

### Conclusion:
The correct answer to the question is that the statement "Eggs and sperms are produced by the same individual" is incorrect for all poriferans.

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