In signoid growth curve, upper asymptote represents period of

Options

A. Establishment
B. Negative accelertion
C. Positive acceleration
D. Equilibrium.

Answer

To answer the question regarding what the upper asymptote represents in a sigmoid growth curve, we can break down the explanation into clear steps:

### Step-by-Step Solution:

1. **Understanding the Sigmoid Growth Curve**:
- The sigmoid growth curve is a graphical representation of how a population grows over time. It typically consists of three distinct phases: the lag phase, the exponential phase, and the steady state phase.

2. **Identifying the Phases**:
- **Lag Phase**: This is the initial phase where the population is adjusting to its environment. Growth is slow as the organisms acclimatize.
- **Exponential Phase**: In this phase, the population grows rapidly as resources are abundant and conditions are favorable.
- **Steady State Phase**: This is the final phase where growth slows down as the population reaches its carrying capacity due to limited resources.

3. **Understanding the Upper Asymptote**:
- The upper asymptote of the sigmoid curve represents the maximum population size that the environment can sustain, known as the carrying capacity.

4. **Equilibrium Period**:
- When the population reaches the upper asymptote, it indicates that the growth rate has stabilized. This is referred to as the period of equilibrium, where the birth rate equals the death rate, and the population size remains relatively constant.

5. **Conclusion**:
- Therefore, in the context of the sigmoid growth curve, the upper asymptote represents the period of equilibrium.

### Final Answer:
The upper asymptote in a sigmoid growth curve represents the period of equilibrium.

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