Which of the following can not be takne as parmeter of measuring the growth in plant body

Options

A. Fresh (or) dry weight of plants body
B. Thickness of leaf lamina
C. Surface area of leaf lamina
D. Length of root (or) stem

Answer

To determine which of the following cannot be taken as a parameter for measuring growth in a plant body, we need to analyze each option provided:

1. **Fresh or Dry Weight of Plant Body**: This is a common parameter used to measure growth. By assessing the fresh or dry weight, we can determine how much biomass the plant has gained over time. Thus, this can be considered a valid parameter.

2. **Thickness of Leaf Lamina**: While thickness can indicate certain aspects of a leaf's health or adaptation, it is not a direct measure of overall plant growth. Growth is typically measured in terms of length, area, volume, or weight, rather than thickness. Therefore, this option is not a valid parameter for measuring growth.

3. **Surface Area of Leaf Lamina**: The surface area of leaves is an important parameter as it relates to photosynthetic capacity. An increase in leaf area can indicate growth, making this a valid parameter.

4. **Length of Root or Stem**: The length of roots and stems is a direct measure of growth. As plants grow, their roots and stems elongate, making this a valid parameter.

Based on the analysis of the options, the parameter that cannot be taken as a measure of growth in the plant body is:

**Answer**: Thickness of Leaf Lamina (Option B)