Maximum rate of growth is achieved during

Options

A. lag period
B. log period
C. steady state
D. senescent phase

Answer

To determine during which phase the maximum rate of growth is achieved, let's analyze the phases of growth in plants:

### Step-by-Step Solution:

1. **Identify the Growth Phases**:
- Growth curves typically consist of four main phases:
- Lag phase
- Log phase (also known as exponential phase)
- Stationary phase
- Senescent phase (or death phase)

2. **Understand Each Phase**:
- **Lag Phase**: This is the initial phase where the growth rate is slow. The plant is adjusting to its environment and preparing for growth.
- **Log Phase (Exponential Phase)**: This is the phase where the growth rate is at its maximum. The plant experiences rapid growth due to ample resources and minimal competition.
- **Stationary Phase**: In this phase, the growth rate stabilizes as resources become limited and the population reaches its carrying capacity.
- **Senescent Phase**: This is the decline phase where growth decreases, and the plant may begin to die off.

3. **Determine the Phase with Maximum Growth**:
- The maximum rate of growth occurs during the **Log Phase**. This is characterized by rapid cell division and growth, resulting in a steep increase in the population.

4. **Conclusion**:
- Therefore, the correct answer to the question "Maximum rate of growth is achieved during" is **Log Phase (Exponential Phase)**.

### Final Answer:
The maximum rate of growth is achieved during the **Log Phase (Exponential Phase)**.

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