Advertisements
Advertisements
Question
Complete the following cycle given as figure by filling the boxes (a), (b),(c), (d).
Solution
The cycle given above represents the nitrogen cycle occurring in the environment.
The atmospheric nitrogen cannot be up taken by plants and animals as such, this is corrected by some bacteria and blue-green algae present in the soil. These microbes fix the atmospheric nitrogen into usable components which are utilised by other living ’organisms.
Nitrogen cycle checks the percentage of nitrogen in the atmosphere and maintains it at a constant level.
- Lightning fixes nitrogen.
- Nitrogen fixing bacteria and blue-green algae fix atmospheric nitrogen.
- Nitrogenous waste from excretion and death.
- Bacteria turns compounds of nitrogen into gaseous nitrogen.
APPEARS IN
RELATED QUESTIONS
Talk to the elderly people in your family to find the answers to the following questions, with reference to the foodstuffs mentioned below: Milk, vegetables, grains, flours, sugar, jaggery.
What measures are taken to keep the foodstuffs in the house in good condition, for as long as possible?
Find and correct the wrong statement.
Foodstuffs dried in summer cannot be used for the rest of the year.
Why do we make jams from fruits?
What are preservatives?
We make Idiyappam by _______ method.
Biriyani is a raw food.
Draw one of your favourite raw food and colour it.
Observe the set-up given in figure and answer the following questions.
- What happens to the sugar solution in A?
- Which gas is released in A?
- What changes will you observe in B when the released gas passes through it?
List the methods of food preservation.
Find the odd-man-out.
