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(a) 75%
(d) air
(b) elemental form of oxygen
(a) parent-rock from which soil is formed
(d) polythene bags
Total Earth’s surface covered by water is
(a) 75%
(a) 75%
See lessBiotic component of biosphere is not constituted by
(d) air
(d) air
See lessThe process of nitrogen-fixation by bacteria does not take place in the presence of
(b) elemental form of oxygen
(b) elemental form of oxygen
See lessMajor source of mineral in soil is the
(a) parent-rock from which soil is formed
(a) parent-rock from which soil is formed
See lessOne of the following factors does not lead to soil formation in nature
(d) polythene bags
(d) polythene bags
See less