Which of the following is not the character of Ctenophora?

Options

A. Exclusively marine
B. Body bears eight external rows of ciliated comb plates
C. Digestion is only intracellular
D. Fertilization is external with indirect development

Answer

To determine which of the following is not a characteristic of Ctenophora, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Ctenophora**: Ctenophores, also known as comb jellies, are marine invertebrates characterized by their unique features. They are known for their gelatinous bodies and the presence of cilia that help them move.

2. **Analyzing the Options**:
- **Option 1**: "Given exclusively by Merain."
- This statement is correct as Ctenophora are indeed classified as invertebrates, which can be referred to as "Comcheli."
- **Option 2**: "Body bears 8 external rows of ciliated comb plates."
- This statement is also correct. Ctenophores are known for having eight rows of ciliated plates (combs) that they use for locomotion.
- **Option 3**: "Digestion is only intracellular."
- This statement is incorrect. Ctenophores exhibit both extracellular and intracellular digestion. Therefore, this option does not describe a characteristic of Ctenophora.
- **Option 4**: "Fertilization is external with indirect development."
- This statement is correct. Ctenophores typically undergo external fertilization and have a life cycle that includes indirect development.

3. **Conclusion**: The option that is not a characteristic of Ctenophora is **Option 3: "Digestion is only intracellular."**

### Final Answer:
The characteristic that is not true for Ctenophora is: **Digestion is only intracellular.**