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प्रश्न
Name the following:
The type of bacteria which directly absorb nitrogen from the air and converted soluble nitrates in the soil.
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उत्तर
Symbiotic bacteria.
संबंधित प्रश्न
What are the causes of air pollution?
Why do we see the sky and air clear and clean after rainfall?
How do the roots of land plants get oxygen for breathing?
Soda bottle bursts sometimes when it is opened during summer. Why?
How do astronauts breathe when they go beyond the earth’s atmosphere?
Write a note on nitrogen.
During respiration, carbon-di-oxide is exhaled out of the body through the ______.
Boojho took an empty plastic bottle, turned it upside down and dipped its open mouth into a bucket filled with water. He then tilted the bottle slightly and made the following observations.
- Bubbles of air came out from the bottle.
- Some water entered the bottle.
- Nitrogen gas came out in the form of bubbles and oxygen got dissolved in water.
- No bubbles formed, only water entered the bottle.
Which observations is/are correct?
Explain the following observations very briefly
An empty glass in fact is not empty.
On a Sunday morning Paheli’s friend visited her home. She wanted to see some flowering plants in the nearby garden. Both of them went to the garden. While returning from the garden they also observed some flowering plants on the road side. But to their surprise they found that the leaves and flowers of these roadside plants were comparatively very dull. Can you help them to know why?
