Question

1. What is atmospheric fixation of Nitrogen?
2. Make neat and labelled sketch of Nitrogen cycle in nature.
3. Describe in brief the role of Nitrogen fixing bacteria and of
lightening in fixing atmospheric nitrogen.
4. Draw flow diagram of oxygen cycle
5. Draw a labelled diagram to show carbon cycle in nature.
6. What are the causes of increase in the concentration of carbon
dioxide in the atmosphere?
7. How is carbon dioxide converted into organic compounds?

Answer 1

Answer:

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$<p style="color:cyan;font-family:cursive;background:black;font size 25px;"> Nitrogen fixation is a process by which molecular nitrogen in the air is converted into ammonia (NH. 3) or related nitrogenous compounds in soil. Atmospheric nitrogen is molecular dinitrogen, a relatively nonreactive molecule that is metabolically useless to all but a few microorganisms.$.

6.)Carbon dioxide is added to the atmosphere naturally when organisms respire or decompose (decay), carbonate rocks are weathered, forest fires occur, and volcanoes erupt. Carbon dioxide is also added to the atmosphere through human activities, such as the burning of fossil fuels and forests and the production of cement.

7.)Photosynthesis in plants makes useful organic compounds out of carbon dioxide through carbon-fixation reactions. ... The process of photosynthesis in plants involves a series of steps and reactions that use solar energy, water, and carbon dioxide to produce oxygen and organic compounds.

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