Which of the following statements is incorrect

Options

A. Cnidocil is for defence in Hydra
B. Nerve cells are absent in Hydra
C. Hydra is a coelentrate
D. Hydra shows budding

Explanation

To determine which statement about Hydra is incorrect, we will analyze each option provided:

1. **Nidoseal for defense in Hydra**:
- Hydra possesses specialized cells called cnidocytes, which contain stinging structures known as nematocysts. These cells are indeed used for defense and capturing prey. Therefore, this statement is correct.

2. **Nerve cells are absent in Hydra**:
- This statement is incorrect. Hydra does have a primitive nervous system, which consists of a network of nerve cells (neurons). These nerve cells are not organized into a centralized brain but are present throughout the body. Thus, this statement is false.

3. **Hydra is a Cnidarian**:
- Hydra belongs to the phylum Cnidaria, which includes jellyfish, corals, and sea anemones. This statement is correct.

4. **Hydra shows budding**:
- Hydra reproduces asexually through a process known as budding, where a new individual develops from a small outgrowth on the parent organism. This statement is also correct.

Based on the analysis, the incorrect statement is:

**Answer**: Nerve cells are absent in Hydra (Option B).