The J-shaped growth curve lacks

Options

A. lag phase
B. exponential phase
C. stationary phase
D. none of these

Answer

### Step-by-Step Solution:

1. **Understanding the J-shaped Growth Curve**:
- The J-shaped growth curve represents a model of population growth where the population size increases rapidly over time under ideal conditions.

2. **Identifying the Phases of the J-shaped Growth Curve**:
- The J-shaped growth curve consists of two main phases:
- **Lag Phase**: This is the initial phase where the population is adjusting to the new environment. During this phase, growth is slow as organisms are acclimatizing.
- **Exponential Phase**: Following the lag phase, the population enters the exponential phase where there is a rapid increase in population size due to abundant resources (food and space).

3. **Recognizing the Absence of the Stationary Phase**:
- In the J-shaped growth curve, there is no stationary phase. The stationary phase is characterized by a balance between birth and death rates, leading to a stable population size. However, in the J-shaped curve, the population does not stabilize; instead, it continues to grow exponentially until resources become limited.

4. **Conclusion**:
- Therefore, the correct answer to the question "The J-shaped growth curve lacks" is the **stationary phase**.

### Final Answer:
The J-shaped growth curve lacks the **stationary phase**.

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