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1. | Joseph Priestley | 2. | Jan Ingenhousz |
3. | Julius von Sachs | 4. | C. B. Van Neil |
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1. | Joseph Priestley | 2. | Jan Ingenhousz |
3. | Julius von Sachs | 4. | C. B. Van Neil |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
1. | Only A and B | 2. | Only B and C |
3. | Only A | 4. | A, B and C |
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C. B. van Niel proved that:
1. | Plants produce glucose when they grow. |
2. | Blue and red light are effective for photosynthesis. |
3. | It is only the green parts of the plants that could release oxygen. |
4. | Hydrogen from a suitable oxidizable compound reduces carbon dioxide to carbohydrates. |
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1. Only I | 2. Only II |
3. Both I and II | 4. Neither I nor II |
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What conclusions can be drawn from the Moll’s half leaf experiment [the given diagram shows the schematic representation of the experiment]?
What can be said after observing the results of the experiment?
I. Negative starch test by the leaf portion present inside the bottle indicates is necessary for this process.
II. Negative test of starch, which is also shown by the portion of the leaf present in between the split of the split cork is due to the lack of and light, thus indicating that both of them are essential requirements.
1. Only I | 2. Only II |
3. Both I and II | 4. None |
The Engelmann experiment shown in the given diagram helped to understand the relationship between:
1. bacteria and the alga used in the experiment.
2. the rate of respiration in aerobic bacteria and wavelengths of light.
3. wavelengths of light and the oxygen released during photosynthesis.
4. rates of oxygen liberation by alga and carbon dioxide liberated by the bacteria.
The diagram shows the famous Engelmann experiment that helped us understand important aspects of the process of photosynthesis. What conclusion can be drawn by the pattern of accumulation of aerobic bacteria shown in the diagram?
1. Excess carbon dioxide is released by the alga in the area of accumulation.
2. Only red and violet lights are effective for photosynthesis.
3. In the areas of accumulation, most oxygen was liberated by the alga.
4. Bacteria are attracted to red and blue light.