Productivity contributed by oceans is . . . . . . but area covered is comparatively . . . . . . .

Total energy fixed by an ecosystem is called

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

Secondary productivity is defined as ...

Which of the following is the least productive ecosystem?