Select an incorrect statement wrt modifications of stem

Options

A. Underground stems of Colocasia are modified to store food in them.
B. Stem tendrils are found in gourds and grapevines
C. Axillary buds of stems may also get modified into woody, straight and pointed thorns.
D. Thorns are found in many plants such as (Opuntia), and (Euphorbia)

Answer

To solve the question of selecting an incorrect statement regarding modifications of stems, we will analyze each statement provided in the question step by step.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks us to identify an incorrect statement related to the modifications of stems in plants.

2. **Analyzing Statement 1**:
- **Statement**: "Underground stems of Colocasia are modified to store food in them."
- **Analysis**: This statement is correct. Colocasia has underground stems called corms, which are indeed modified for food storage.

3. **Analyzing Statement 2**:
- **Statement**: "Stem tendrils are found in goats and grapevines."
- **Analysis**: This statement is also correct. In plants like grapevines (Vitis) and certain varieties of gourds (like cucumbers), axillary buds can modify into tendrils.

4. **Analyzing Statement 3**:
- **Statement**: "Axillary buds of stems may also get modified into woody, straight, and pointed thorns."
- **Analysis**: This statement is correct as well. In plants such as citrus and bougainvillea, axillary buds can develop into thorns.

5. **Analyzing Statement 4**:
- **Statement**: "Thorns are found in many plants called Opuntia and Euphorbia."
- **Analysis**: This statement is incorrect. In Opuntia (cacti) and Euphorbia, the thorns are not modifications of the stem; they are modified leaves or structures that serve a similar purpose.

6. **Conclusion**: Based on the analysis, the incorrect statement regarding modifications of stems is the fourth statement.

### Final Answer:
The incorrect statement is: "Thorns are found in many plants called Opuntia and Euphorbia."