Question

Nine-tenth of all photosynthesis of world (85-90%) is carried out by

(a) Large trees with millions of branches and leaves 

(b) Algae of the ocean

(c) Chlorophyll containing ferns of the forest 

(d) Scientists in the laboratories 

Answer 1

Correct option  (b) Algae of the ocean

Explanation :

90% of total photosynthesis is carried out by aquatic plants, chiefly algae (80% in oceans and 10% in freshwater). 10% of total photosynthesis is performed by land plants.