Biology
Given below is a flow chart of 'Nitrogen Cycle'. Read the information after the diagram and fill in the blanks.
Nitrogen is one of the essential elements for the growth and development of plants. About 79% of the atmosphere is Nitrogen but plants cannot obtain it directly from the atmosphere.
Plants can obtain nitrogen only in the form of nitrates, which they absorb from the soil through roots. These nitrates are replenished in the soil by bacteria through the process of (a) …………… . Some bacteria convert nitrogenous wastes of plants and animals into (b) …………… which are then converted into (c) …………… compounds. Further, these compounds are converted into nitrites and nitrates by bacteria (d) …………… and (e) …………… respectively.
Answer
Plants can obtain nitrogen only in the form of nitrates, which they absorb from the soil through roots. These nitrates are replenished in the soil by bacteria through the process of Nitrogen fixation . Some bacteria convert nitrogenous wastes of plants and animals into Ammonia which are then converted into Ammonium compounds. Further, these compounds are converted into nitrites and nitrates by bacteria Nitrosomonas and Nitrobacter respectively.
Related Questions
Given below is the structure of a bacterial cell. Match the structures marked (a) to (e) with their function or characterstics given.
Example: (f)-6: Lies immediately beneath the cell wall and surrounds the cytoplasm.
Fill in the blanks:
- The specific genus to which several species of yeast belong is …………… .
- …………… is a unicellular fungi.
- Alcoholics may develop body ailments like …………… due to over consumption of alcohol.
- The curd from which moisture has been removed is termed as …………… .
- Cheese is a good source of vitamin …………… and …………… .
Define the terms
(a) Fermentation
(b) Spawning
Where can the mould Rhizopus be most easily found?