Axillary buds develop

Options

A. Endogenously from plerome
B. Endogenously from pericycle
C. Exogenously from outer cortex
D. Exogenously from epidermis

Answer

**Step-by-Step Solution:**

1. **Understanding Axillary Buds**:
- An axillary bud is an embryonic structure that has the potential to develop into a new shoot or branch. It is located at the junction of the stem and the petiole (the stalk that attaches a leaf to the stem).

2. **Defining Key Terms**:
- The question uses the terms "endogenously" and "exogenously".
- "Endogenously" refers to growth or development that originates from within an organism or structure.
- "Exogenously" refers to growth or development that originates from outside an organism or structure.

3. **Identifying the Origin of Axillary Buds**:
- To determine whether axillary buds develop endogenously or exogenously, we need to analyze their position and the layers of the plant structure.
- In the context of plant anatomy, axillary buds are found at the outer layers of the plant, specifically near the outer cortex.

4. **Analyzing the Plant Structure**:
- In a longitudinal section of a plant (as described in the video), the outermost layer is the epidermis, followed by the cortex.
- The axillary buds are located just beneath the epidermis and are associated with the cortex.

5. **Conclusion**:
- Since axillary buds develop from the outer cortex, they are formed exogenously (from outside) rather than endogenously (from within).

6. **Final Answer**:
- Axillary buds develop exogenously from the outer cortex.

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