Please select a subject first
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Name the following:
The principle site in a green leaf for photosynthesis.
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Name the following:
The products that are formed as a result of photosynthesis.
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Name the following:
Three organisms that cannot prepare their own food by photosynthesis.
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Name the following:
The cell organelle responsible for photosynthesis.
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The following statement is about photosynthesis in a green plant. Write whether it is True or False.
The raw materials for photosynthesis include water and carbon dioxide.
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The following statement is about photosynthesis in a green plant. Write whether it is True or False.
Land plants obtain their carbon dioxide from the atmosphere.
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The following statement is about photosynthesis in a green plant. Write whether it is True or False.
Photosynthesis occurs in underground organs as well as in aerial ones.
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The following statement is about photosynthesis in a green plant. Write whether it is True or False.
Photosynthesis results in a gain in dry weight.
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The following statement is about photosynthesis in a green plant. Write whether it is True or False.
A variegated leaf (one that has white as well as green patches) will only photosynthesize in the green areas.
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Fill in the blank:
______ is the process which replenishes the atmospheric oxygen which the animal life consumes in respiration.
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Fill in the blank:
Photosynthesis produces oxygen and ______.
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Fill in the blank:
Xanthophyll is ______ coloured pigment.
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Fill in the blanks:
The end products of photosynthesis are ______ and ______.
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Fill in the blank:
CO2 enters the leaf through ______.
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Match the terms of column I with those in column II:
| Column I | Column II |
| (i) Stomata closed | (a) decomposers |
| (ii) Autotrophs | (b) light reaction |
| (iii) By-products of photosynthesis | (c) animals |
| (iv) Photolysis | (d) during night |
| (v) Bacteria and fungi | (e) green plants |
| ( f) oxygen |
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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.
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