Growth is measured by the following parameter

Options

A. Increase in fresh weight , dry weight & length
B. Increase in cell number , cell volume and area
C. Increase in cell volume and dry weight
D. Increase in cell number , volume, area, length, fresh weight and dry weight .

Answer

To answer the question "Growth is measured by the following parameter," we need to analyze the options provided and understand how growth is defined and measured in biological terms.

### Step-by-Step Solution:

1. **Understanding Growth**:
- Growth in plants is primarily a cellular process. It involves an increase in protoplasm, which leads to an increase in cell size and number.

2. **Identifying Parameters of Growth**:
- Growth can be measured by various parameters:
- **Increase in Length**: This refers to the elongation of roots, stems, or leaves.
- **Increase in Volume**: This pertains to the overall volume of plant parts, such as roots and stems.
- **Increase in Area**: This is relevant for leaves, where the surface area can be measured.
- **Increase in Diameter**: This applies to the thickness of stems or trunks.
- **Increase in Weight**: This can be measured as either fresh weight (the weight of the plant with water) or dry weight (the weight after all water is removed).

3. **Evaluating the Options**:
- **Option 1**: Increase in fresh weight, dry weight, and length.
- **Option 2**: Increase in cell number, cell volume, and area.
- **Option 3**: Increase in cell volume and dry weight.
- **Option 4**: Increase in cell number, volume, area, length, fresh weight, and dry weight.

4. **Selecting the Correct Option**:
- The fourth option encompasses all the relevant parameters of growth. It includes:
- Cell number (indicating how many cells are produced),
- Cell volume (indicating the size of the cells),
- Area (particularly for leaves),
- Length (for roots and stems),
- Fresh weight (the total weight with water),
- Dry weight (the weight without water).
- Since growth can be measured by all these parameters, the fourth option is the most comprehensive and correct.

### Conclusion:
The correct answer is **Option 4: Increase in cell number, volume, area, length, fresh weight, and dry weight**.

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