Which of the following act as decomposers in an ecosystem?
(a) Lactobacillus bacteria (b) Cyanobacteria (c) Putrefying bacteria (d) Rhizobium bacteria
Which of the following increase the fertility of soil ?
A. Lactobacillus bacteria B. Rhizobium bacteria C. Spirogyra algae D. Blue-green algae
(a) A and B (b) B and C (c) A and D (d) B and D
Which bacteria fixes nitrogen in the soil ?
(a) Nitrobacter (b) Nitrosomonas (c) Rhizobium (d) Clostidium