If we plot the parameter of growth against time the curve obtained is known as,

Options

A. T-shaped curve
B. U-shaped curve
C. G-shaped curve
D. S-shaped curve.

Answer

To solve the question, "If we plot the parameter of growth against time the curve obtained is known as," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Growth Parameters**:
- Growth parameters can include height, weight, or any measurable aspect of plant growth over time.

2. **Plotting Growth Against Time**:
- When we plot these parameters against time, we are essentially creating a graph that shows how a plant grows as time progresses.

3. **Identifying the Shape of the Curve**:
- The growth curve typically does not increase uniformly. Instead, it exhibits different phases of growth.

4. **Recognizing the Phases of Growth**:
- **Lag Phase**: Initial slow growth as the plant adjusts to its environment.
- **Log Phase (Exponential Phase)**: Rapid growth as the plant utilizes available nutrients.
- **Stationary Phase**: Growth levels off as nutrients become limited, and the plant reaches a balance.
- **Death Phase**: Eventually, the plant may die, leading to no growth.

5. **Conclusion**:
- The overall shape of the growth curve when plotted over time is an S-shaped curve, also known as a sigmoid curve.

6. **Final Answer**:
- Therefore, if we plot the parameter of growth against time, the curve obtained is known as the **sigmoid curve**.