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Nitrogen Fixation and Photosynthesis

Nitrogen Fixation and Photosynthesis
Which of the following bacteria genus is capable of oxidizing ammonia (NH4)?

Nitrosobacter
Nitrosococcus
Nitrospina
Nitrobacter

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Nitrogen Fixation and Photosynthesis
The chief source of nitrogen for green plants is

low molecular weight- organic nitrogenous compound
nitrates
ammonium salts
atmospheric nitrogen

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Nitrogen Fixation and Photosynthesis
Nitrosomonous and Nitrobacter obtain their carbon for growth from

elementary carbon
organic compounds
carbon dioxide
none of these

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Nitrogen Fixation and Photosynthesis
Which of the following molecule is produced from the fixation of CO2 in C4 plants?

Pyruvate
Alpha-ketoglutarate
Oxaloacetate
Malate

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Nitrogen Fixation and Photosynthesis
An organism that relies exclusively on pre-synthesized food molecules is

prokaryotic
heterotrophic
autotrophic
photosynthetic

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Nitrogen Fixation and Photosynthesis
Which of the following aid plants in the acquisition of nitrogen from nitrogen gas of the atmosphere?

Nematodes
Moulds
Algae
Bacteria

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