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प्रश्न
What is meant by photosynthesis? Why is it so important in nature?
उत्तर
Photosynthesis: It is an anabolic process by which plants manufacture
carbohydrates or food material with the help of water and carbon dioxide in the
presence of sunlight and chlorophyll.
It is an important process as:
a. It produces food directly or indirectly for all living organisms on earth.
b. It maintains balance between oxygen and carbon dioxide in the atmosphere.
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संबंधित प्रश्न
Cochlea, Malleus, Pinna, Stapes, Incus.
The following diagram demonstrates a physiological process taking place in green plants. The whole set up was placed in bright sunlight for several hours. Study the diagram and answer the questions that follow
(i) What aspect of the physiological process is being examined?
(ii) Explain the physiological process mentioned in (i) above.
(iii) Label the parts numbered 1 and 2 in the diagram.
(iv) Write a well-balanced chemical equation for the physiological process explained in (ii) above.
(v) What would happen to the rate of bubbling of the gas if a pinch of sodium bicarbonate is added to the water in the beaker? Explain your answer.
The process of conversion of ADP into ATP during photosynthesis.
Give one example of An aquatic plant used in the laboratory to demonstrate O2 liberation during photosynthesis
Complete the following paragraph by filling in the blank (1) to (5) with appropriate words:
To test a leaf for starch, the leaf is boiled in water to (1) _________. It is then boiled in Methylated spirit to (2) ________. The leaf is dipped in warm water to soften it. It is placed in a petri dish, and (3) _____ solution is added. The region of the leaf which contains starch, turns (4) ________and the region while does not contain starch, turns (5) __________.
Describe an experiment to prove that sunlight is necessary for photosynthesis.
Mention two ways in which photosynthesis is useful to life.
Fill in the blank:
Xanthophyll is ______ coloured pigment.
Which one chemical reaction occurs during photosynthesis?
The specific function of light energy in the process of photosynthesis is to
Identify the false statements and rewrite them correctly by changing the first or last word only.
Algae are autotrophs.
The site of light reaction in the cells of a leaf is ______.
What is the importance of photosynthesis in the life of the following:
Green plants
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 blanks:
→ __________ → __________ → Hen → Man
Choose the correct option.
In maize and wheat, the first stable products formed in bundle sheath cells respectively are ________.
What will happen if we remove plants from the aquarium?
The source of O2 liberated in photosynthesis is ______.
Read the following sentences about photosynthesis.
- Sunlight, carbon dioxide, chlorophyll and water are necessary.
- Oxygen is absorbed.
- Leaves carry out photosynthesis.
- Proteins are made during photosynthesis.
Choose the correct pair of sentences that are true to photosynthesis.
The raw materials for photosynthesis are ______ and ______.
