Muscles of Hydra are

Options

A. Smooth
B. Skeletal
C. Both A and B
D. None of the above.

Answer

To answer the question about the muscles of Hydra, let's break it down step by step.

### Step-by-Step Solution:

1. **Understanding Muscle Types in Higher Organisms**:
- In higher organisms, muscles are generally classified into three types: smooth, skeletal, and cardiac muscles.
- Smooth muscles are involuntary and found in visceral organs.
- Skeletal muscles are voluntary and are responsible for locomotion and other controlled movements.
- Cardiac muscles are specialized muscles found only in the heart.

2. **Identifying the Origin of Muscles**:
- In higher organisms, muscles typically arise from the mesodermal layer during embryonic development.
- However, the muscles of Hydra are different from those of higher organisms.

3. **Muscles of Hydra**:
- Hydra belongs to the phylum Cnidaria.
- The muscles of Hydra are not derived from the mesoderm; instead, they originate from the epidermis.
- These muscles are referred to as epidermal muscles.

4. **Analyzing the Given Options**:
- The options provided are:
- A) Smooth muscles
- B) Skeletal muscles
- C) Both A and B
- D) None of the above
- Since the muscles of Hydra are epidermal in origin and do not fit into the categories of smooth or skeletal muscles, options A, B, and C are incorrect.

5. **Conclusion**:
- Therefore, the correct answer is option D: None of the above, as the muscles of Hydra are epidermal muscles.

### Final Answer:
The muscles of Hydra are epidermal in origin, so the correct answer is **None of the above**.