Which of the following statements is (are) TRUE for carbon, nitrogen and phosphorus cycles?
You can select up to 2 statements
a. CO₂ is produced via respiration as a by-product al
b. The carbon, nitrogen and phosphorus cycles all have a gaseous phase.
c. Nitrogen can be cycled without the involvement of bacteria.
d. Phosphate can be assimilated by plants
e. Nitrogen in its gas form (N₂) can be assimilated by plants.