Match List-I with List-II regarding ecological parameters and their standard units. List-I List-II A. Productivity I. Number m ⁻² B. Standing crop (biomass) II. g , m ⁻² , yr ⁻¹ C. Standing crop (number) III. kg , m ⁻² Choose the correct answer from the options given below:

Step-by-step solution

Productivity is defined as the rate of biomass production, which requires both an area and a time dimension. Hence, it is measured in g , m ⁻² , yr ⁻¹ (A-II). Standing crop is the amount of living material present in an ecosystem at a given time. It lacks a time dimension. When measured as biomass, it is expressed as mass per unit area, such as kg , m ⁻² or g , m ⁻² (B-III). When standing crop is measured as a number, it is expressed as the number of individuals per unit area, such as Number m ⁻² (C-I). Therefore,