Discuss the gross primary productivity is more efficient than net primary productivity. 

Define net primary productivity.

Define primary productivity .

Define gross primary productivity.

Read the given statements and select the correct option. Statement 1: Net primary productivity is less than the gross primary productivity. Statement 2 : Net primary productivity is equal to the gross primary productivity minus the respiration losses.

List the factors affecting primary productivity.

Primary productivity depends upon

Write about the factors affecting primary productivity.

Match column I with column II and select the correct option from the given codes. {:("column I","Column II"),("Gross primary productivity",(i)"Self-sustainable"),("Net primary productivity",(ii)"Aquatic ecosystem"),("Pond",(iii)O_(2)"requiring process"),("Aquarium",(iv)"Photosynthetic production"),("Decompositon",(v)"Available to secondary consumers"):}

How Net Primary Productivity can be derived?

Identify the factor that does not affect the primary productivity.