Which of the following statements is incorrect

Options

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

Answer

To determine which statement about Hydra is incorrect, we will analyze each of the provided statements one by one.

### Step 1: Analyze the first statement
**Statement:** Cnidocytes are for defense in Hydra.
**Analysis:** Cnidocytes are specialized cells found in cnidarians, including Hydra. They contain stinging organelles called nematocysts, which can inject toxins into prey or potential threats. This function serves both feeding and defense purposes.
**Conclusion:** This statement is **correct**.

### Step 2: Analyze the second statement
**Statement:** Nerve cells are absent in Hydra.
**Analysis:** Hydra does not have a well-developed nervous system, but it does possess nerve cells. These nerve cells are organized into a nerve net, which allows for basic responses to stimuli. Therefore, the statement claiming that nerve cells are absent is false.
**Conclusion:** This statement is **incorrect**.

### Step 3: Analyze the third statement
**Statement:** Hydra is a coelenterate.
**Analysis:** The term "coelenterate" is an older term that refers to animals in the phylum Cnidaria, which includes Hydra. Thus, Hydra is indeed classified as a coelenterate.
**Conclusion:** This statement is **correct**.

### Step 4: Analyze the fourth statement
**Statement:** Hydra shows budding.
**Analysis:** Budding is a common method of asexual reproduction in Hydra, where a new individual develops from an outgrowth of the parent. This process is well-documented in Hydra species.
**Conclusion:** This statement is **correct**.

### Final Conclusion
After analyzing all the statements, the only incorrect statement is: **"Nerve cells are absent in Hydra."** Therefore, the answer to the question is that the incorrect statement is option B.

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