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What part do (a) nitrifying, (b) nitrogen-fixing and (c) denitrifying bacteria play in the nitrogen cycle?
a) Nitrifying bacteria in the soil change ammonia and other nitrogenous substances (e.g.urea) into nitrates.
b) Nitrogen-fixing bacteria (in the soil or in root nodules) convert gaseous nitrogen into nitrogenous compounds.
c) Denitrifying bacteria in the soil, decompose nitrogenous compounds to make gaseous nitrogen
Leaves give off water vapour Use two same pots of soil, one with a small plant and the other without. Cover the soil in every pot with cardboard as shown in the diagram after w
Q. Study of food texture? We learnt earlier that texture is observed in terms of tactile sensations i.e. finger feel and mouth feel. Finger feel is sensed before ingestion, by
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Define Objective of Taxonomy - Assemblage of Knowledge Gained? A second objective of taxonomy is the assemblage of knowledge gained. This is usually in the form of treatises us
genetic reason.medications
Carbohydrate characteristic chemical features include: Select one: a. the potential to form multiple hydrogen bonds. b. the existence of one or more asymmetric centers.
Protozoans - Body Form The protozoan body is usually bound only by the cell membrane called plasmalemma. In some protozoans such as in ciliates the rigidity and the flexibili
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Haemophilus influenzae type b (Hib) Hib is endemic worldwide. Previously unvaccinated infants
What is the mechanism that ensures Mendel's First Law of segregation?
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