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प्रश्न
How is the rate of photosynthesis affected when a green plant gets the green light?
उत्तर
The rate of photosynthesis decreases and finally stops when the green plant gets green light because green light is not absorbed but reflected back by the plant.
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संबंधित प्रश्न
Describe an experiment to prove that sunlight is necessary for photosynthesis.
Fill in the blanks:
The end products of photosynthesis are ______ and ______.
How does carbon dioxide return to the atmosphere? Explain.
A student in order to study the importance of certain factors of photosynthesis took a potted plant and kept it in the dark for over 24 hours. Then in the early hours of the morning the student covered one of the leaves with black paper in the centre only. Student placed the potted plant in the sunlight for a few hours, and then tested the leaf which was covered with black paper for starch.
(i) What aspect of photosynthesis was being investigated?
(ii) Is there any control in this experiment? If so, state the name.
(iii) Why was the plant kept in the dark before the experiment?
(iv) Describe step by step how the candidate proceeded to test the leaf for the presence of starch.
Choose the correct answer:
The process of photosynthesis occurs by _________
Identify the false statements and rewrite them correctly by changing the first or last word only.
Immediate product of photosynthesis is glucose.
Oxygen given out during photosynthesis comes from water. Explain this statement.
Complete the following food chain by writing the names of appropriate organisms in the blanks:
Grass → __________ → Snake → __________
The figure below represents the vertical section of a leaf:
(i) Name the parts 1 to 5.
(ii) How many veins have been shown?
(iii) State the functions of parts 4 and 5.
Explain the term Plastoquinone.
Give technical term:
Organisms which cannot prepare their own food by photosynthesis.
Complete the following sentence with appropriate word:
A dark reaction is a __________ reaction.
Write the functional activity of the following structure:
Granum
Write the functional activity of the following structure:
Chloroplasts
Column ‘II’ is a list of items related to ideas in Column ‘I’. Match the term in Column ‘II’ with the suitable idea given in Column ‘I’.
| Column I | Column II | ||
| (i) | Grana | (a) | Decomposers |
| (ii) | Autotrophs | (b) | Light reaction |
| (iii) | By-products of photosynthesis | (c) | Animals |
| (iv) | Photolysis | (d) | Oxygen |
| (v) | Bacteria and fungi | (e) | Stimulated by light |
| (vi) | Chloroplast | (f) | Power |
| (vii) | Oxygen and water | (g) | Raw material |
| (viii) | Sunlight | (h) | Machinery |
| (ix) | CO2 and water | (i) | End products |
| (x) | Glucose (sugar) | (j) | Workrooms |
| (xi) | Cells in the leaf | (k) | By-products. |
Choose the correct option.
In maize and wheat, the first stable products formed in bundle sheath cells respectively are ________.
Planting trees help in decreasing global warming.
State whether true or false. If false, correct the statement.
Plants lose water when the stomata on leaves are closed.
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.
Sunflowers open the petals in bright light during the daytime but close the petals in dark at night. This response of sunflowers is called ______.
Which of the following is not applicable to the process of photosynthesis?
