Advertisements
Advertisements
प्रश्न
What is nitrogen-fixation?
Advertisements
उत्तर
Nitrogen fixation : Symbiotic bacteria living in the root nodules of leguminous plants like peas, beans, absorb nitrogen directly from air and convert into nitrates. Thereafter, the plants convert it into proteins. Nitrogen is returned to the soil when plant and animal matter decays. This decomposition work is done by organisms called denitrifying bacteria which reconvert dead organic tissue into its constituent nitrogen.
APPEARS IN
संबंधित प्रश्न
Answer the question put against the following constituents of air:
Nitrogen : Explain its significance for plants and animals.
Fill in the blank space by choosing the correct word from the given list.
List: oxygen, carbonic, suIphurUioxide gas, precipitation, helium
_______ gas is used for filling weather observation balloons.
Name and briefly explain four ways by which pollution of air is caused by humans.
Give reason:
A burning candle stops burning if covered with a glass tumbler
Complete the statement given below by filling in the blank with the correct word from the words given
___________is an example of a pollutant present in the air.
Give word equation for the following conversion:
Nitrogen dioxide to nitric acid
How will you prove that soil contains air in it?
Explain carbon dioxide and its uses.
A list of words is given in a box. Use appropriate words to fill up the blank in the following statement.
Mountaineers carry oxygen ______ with them, while climbing high mountains.
Explain the following observations very briefly
Breathing through mouth may harm you.
