Gross Primary Productivity $(GPP)$ is defined as:

The rate at which energy is stored at the level of primary consumers is known as:

The rate of formation of new organic matter by a rabbit in a grassland is called:

Secondary productivity is defined as:

State whether the following statements are True or False:
$I.$ The total organic matter synthesized by the producers in the process of photosynthesis per unit time and area is known as gross primary productivity.
$II.$ Net primary productivity is the weight of the organic matter stored by the producers in a unit area/volume per unit time.

Net primary productivity $(NPP)$ in an ecosystem is: