Approximately $.............$ of the Earth's surface is covered by oceans,yet the productivity of the oceans is only $...............$.

Net primary productivity is utilised by

Which of the following is the least productive ecosystem?

The total annual productivity of the whole biosphere is:

Which ecosystem exhibits the maximum gross primary productivity?

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.