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प्रश्न
How do the roots of land plants get oxygen for breathing?
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उत्तर
The roots can absorb oxygen from the small air spaces in soil.
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संबंधित प्रश्न
Answer the question put against the following constituents of air:
Nitrogen : Explain its significance for plants and animals.
Answer the question put against the following constituents of air :
Oxygen : What is the percentage proportion of oxygen in air ? Why is oxygen called active air.
Tick (√) the most appropriate answer.
Symbiotic bacteria is not present in the nodules of :
Give reason:
A burning candle stops burning if covered with a glass tumbler
Give word equation for the following conversion:
Nitric oxide to nitrogen dioxide
Of the total volume of air – 4/5th is nitrogen. State the utility or consequence of this ratio.
Mention one necessary condition for the combustion to take place.
How will you prove that air supports burning?
The component of air used by green plants to make their food, is ______.
Explain the following observations very briefly
Breathing through mouth may harm you.
