Muscles in sponges are

Options

A. Striated
B. Smooth
C. Both striated and smooth
D. None of these

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question pertains to sponges, which belong to the phylum Porifera. This is essential to understand their biological characteristics.

2. **Understand Body Organization**: Sponges have a cellular type of body organization. This means that their body is made up of individual cells that perform their own functions rather than being organized into tissues or organs.

3. **Muscle Presence in Sponges**: It is important to note that sponges do not possess true muscles. Unlike higher organisms, they lack an organized muscular system.

4. **Muscle Proteins**: Although sponges do not have muscles, they contain certain proteins similar to those found in muscle cells. These proteins, such as myosin, are involved in the movement of water through the sponge's body, which is crucial for their feeding and respiration.

5. **Conclusion**: Since sponges do not have any muscles, the correct answer to the question is that they have "none of these." Therefore, the answer is option D.

**Final Answer**: Muscles in sponges are none of these (Option D).

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