Plasticity in plant growth means that

Options

A. plant roots are extensible
B. plant development is dependent on the environment
C. stems can extend
D. none of the above

Explanation

**Step-by-Step Solution:**

1. **Understanding Plasticity**: Plasticity in plant growth refers to the ability of a plant to adapt and adjust its growth and development in response to environmental conditions.

2. **Defining the Concept**: The term "plasticity" can be defined as the ability of a plant to modify its growth patterns based on various environmental factors such as temperature, light, water availability, and nutrient levels.

3. **Importance of Plasticity**: Plants need to exhibit plasticity to survive in changing environments. For example, if a plant experiences extreme heat or cold, it may need to alter its growth rate or metabolic processes to cope with these conditions.

4. **Examples of Plasticity**:
- If a plant is damaged (e.g., by herbivores or physical injury), it can initiate cell division to heal the damaged area.
- Plants may also adjust their growth patterns, such as extending their roots deeper in search of water or growing taller to reach sunlight.

5. **Conclusion**: Based on the definition and examples provided, we can conclude that plasticity in plant growth means that plant development is dependent on the environment. Therefore, the correct answer is option B: "plant development is dependent on the environment."

---