Question

Question 28
Complete the following cycle given as Fig. 2.4 by filling the blanks (a), (b), (c) (d)

Answer 1

(a) Lightning fixes nitrogen
(b) Nitrogen fixing bacteria and blue green algae fix atmospheric nitrogen.
(c) Nitrogeneous waste from excretion and death and decay of organisms
(d) Bacteria turn compounds of nitrogen into gaseous nitrogen.