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प्रश्न
Mention two ways in which photosynthesis is useful to life.
उत्तर
Advantages of photosynthesis:
(a) To produce food for all the organisms on earth.
(b) Release oxygen which is a life supporting gas.
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संबंधित प्रश्न
Briefly explain the following terms: Photophosphorylation
The diagram below shows two test-tubes A and B. Test-tube A contains a green water plant. Test-tube B contains both a green water plant and a snail. Both testtubes are kept in sunlight. Answer the questions that follow:
(i) Name the physiological process that releases the bubbles of oxygen.
(ii) Explain the physiological process as mentioned above in Q2 (a)(i).
(iii) What is the purpose of keeping a snail in test-tube ‘B’?
(iv) Why does test-tube ‘B’ have more bubbles of oxygen?
(v) Given an example of a water plant that can be used in the above process.
(vi) Write the overall chemical equation for the above process.
Given below is an experiment setup to demonstrate a particualr tropic movement in germinating seeds. Study the diagram and answer the questions that follow :
(ii) Name the tropic movement shown by part 1.
The diagram given below represents an experiment to prove the importance of a factor in photosynthesis. Answer the questions that follow : 
Name the factor studied in this experiment.
Name the following:
The cell organelle responsible for photosynthesis.
Photosynthesis in green plants is directly and indirectly dependent on so many plant structures.
Explain briefly the role of the following structures in this process is Phloem tissue in the leaf veins.
Give some adaptations in green leaf photosynthesis.
How do non-green plants such as fungi and bacteria obtain their nourishment?
Complete the following food chain by writing the names of appropriate organisms in the blank:
Grass → __________ → Lion
All life on earth Would come to an end if there were no green plants.
Give technical term:
The main reaction which means the breaking up of water molecules through light.
Give technical term:
Which process is the ultimate source of energy for all living organisms?
Write the functional activity of the following structure:
Thylakoids
What will happen if we remove the fish from the aquarium and keep it (with green plants) in a dark place?
Name the plant part
- Which bends in the direction of gravity but away from the light.
- Which bends towards light but away from the force of gravity.
Why should the light-dependent reaction occur before the light-independent reaction?
Plants utilize only ______% of the absorbed water for photosynthesis and the other activities.
Which gas evolved during photosynthesis?
Given below are groups of terms. The first pair indicates the relationship between the two terms. Complete the second pair accordingly.
Producers : Autotrophs : : Consumers : ______
