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Environment › Biofertilizers/Fuels
Which feature of some species of blue green algae helps promoted them as bio-fertilizers?
(a)
They convert atmospheric methane into ammonia which the crop plants can absorb readily.
(b)
They induce the crop plants to produce the enzymes which help convert atmospheric nitrogen to nitrates.
(c)
They have the mechanism to convert atmospheric nitrogen into a form that the crop plants can absorb readily.
(d)
They induce the roots of the crop plants to absorb the soil nitrates in larger quantities.
(C)
Hydrogen fuel cell vehicles produce one of the following as ‘exhaust’
NH3
CH4
H2O
H2O2
In the context of alternative sources of energy, ethanol as a viable bio-fuel can be obtained from:
Potato
Rice
Sugarcane
Wheat