The Shape of growth curve obtained when the length of an organ is plotted against the time is

Options

A. Parabola
B. S' Shape
C. Linear
D. Step wise

Answer

To answer the question regarding the shape of the growth curve obtained when the length of an organ is plotted against time, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Growth Curves**: A growth curve is a graphical representation that shows how a particular quantity, such as the length of an organ, increases over time.

2. **Identifying the Shape**: When we plot the length of an organ against time, we observe that the growth does not occur at a constant rate. Instead, it typically follows a specific pattern.

3. **Recognizing the Sigmoid Curve**: The growth curve for many biological systems, including plant growth, often takes the shape of an "S" or sigmoid curve. This curve represents three phases of growth: lag phase, exponential growth phase, and a plateau phase.

4. **Eliminating Incorrect Options**:
- **Parabola**: This shape represents quadratic growth, which is not applicable in this context.
- **Linear**: This would imply constant growth, which does not accurately reflect biological growth patterns.
- **Step-wise**: This suggests abrupt changes in growth, which is also not characteristic of the typical growth pattern.

5. **Conclusion**: Therefore, the correct answer is that the shape of the growth curve obtained when the length of an organ is plotted against time is a sigmoid curve.

### Final Answer:
The shape of the growth curve obtained when the length of an organ is plotted against time is a sigmoid curve (option B).

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