The total annual productivity of the whole biosphere is:

Regarding the Gross Primary Productivity $(GPP)$ and Net Primary Productivity $(NPP)$ of an ecosystem,which of the following statements is correct?

Primary productivity is defined as:

What is $NPP$?

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

The rate at which light energy is converted into chemical energy of organic molecules is the ecosystem's