Ausetic growth occurs in

Options

A. Humans beings
B. Frog
C. Nematods
D. Lizards

Answer

### Step-by-Step Solution

1. **Understanding the Concept of Auxetic Growth**:
- Auxetic growth refers to the increase in the size of cells without cell division. This means that the cells grow larger but do not undergo the typical process of dividing into new cells.

2. **Identifying Where Auxetic Growth Occurs**:
- Auxetic growth can occur in both plants and animals. In plants, this growth is primarily associated with the increase in cell size due to the action of plant hormones known as auxins.

3. **Auxins in Plants**:
- Auxins are responsible for promoting cell elongation and growth in plants. They play a crucial role in processes such as apical dominance, where the growth of the main stem is prioritized over side branches.

4. **Auxetic Growth in Animals**:
- In animals, auxetic growth occurs in specific tissues, particularly in the muscles of higher animals. It is also observed in certain organisms like nematodes, tunicates, and rotifers.

5. **Evaluating the Options**:
- The question provides four options:
1. Human beings
2. Flora (plants)
3. Nematodes
4. Lizards
- From the discussion, we can conclude that auxetic growth does not occur in human beings or lizards. It does occur in nematodes and certain plant tissues.

6. **Selecting the Correct Answer**:
- Based on the information provided, the correct answer to the question "Auxetic growth occurs in" is **Nematodes** (Option 3).

### Final Answer
**Auxetic growth occurs in Nematodes.**

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