Which of the following curves corresponds to maximum growth ?

Options

A. Logistic curve
B. Exponential curve
C. Lag curve
D. Stationary phase

Answer

To determine which curve corresponds to maximum growth, we will analyze the different growth phases and their characteristics.

### Step-by-Step Solution:

1. **Identify the Growth Phases**:
- The growth curve typically consists of four phases: lag phase, exponential phase, stationary phase, and senescent phase (or death phase).

2. **Analyze Each Option**:
- **Logistic Curve**: This curve does not represent a specific phase of growth. It is a model that describes population growth with a carrying capacity but does not indicate maximum growth. Therefore, this option can be excluded.

- **Exponential Curve**: This curve represents the second phase of growth, known as the exponential phase. During this phase, the growth rate is at its peak, and the organism (or plant) experiences rapid growth. This is the phase where maximum growth occurs. Hence, this option is correct.

- **Lag Curve**: The lag phase is the first phase of growth where the growth is slow but steady. In this phase, new cells are formed, but the overall growth is not at its maximum. This option is incorrect.

- **Stationary Phase**: The stationary phase is the third phase of growth where growth activity declines as the cells mature. This phase indicates a balance between cell division and cell death, leading to no net growth. Therefore, this option is also incorrect.

3. **Conclusion**:
- After analyzing all options, it is clear that the exponential curve corresponds to maximum growth.

### Final Answer:
The curve that corresponds to maximum growth is the **exponential curve**.