Total amount of energy trapped by green plants in food is called:
1.  Gross primary production
2.  Net primary production
3.  Standing crop
4.  Standing state

Maximum photosynthesis is done by:
1.  Phytoplankton
2.  Zooplankton
3.  Marsh plants
4.  Woody plants

Which is the reason for the highest biomass in an aquatic ecosystem:

1. Nano plankton, blue-green algae, green algae

2. Seagrass, and slime molds

3. Benthonic and brown algae

4. Diatoms

Which of the following is expected to have the highest value (gm/$m^2$ /yr) in a grassland ecosystem: 

1. Tertiary production

2. Gross production (GP)

3. Net production (NP)

4. Secondary production