15. The table below shows the results of an experiment carried out by a couple of...
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15. The table below shows the results of an experiment carried out by a couple of Form 1 students to measure the rate of photosynthesis at different light intensities and varying carbon dioxide concentrations. The rate was determined by counting the number of bubbles of oxygen released per minute. The temperature was kept constant. Light Intensity (Lux) b) 1500 c) d) 6000 1000 Car bo n Di oxi de Co nce ntr ati on (% 0 0 0.3 0 16 0 52 80 0.6 30 80 100 0.9 1.2 38 40 96 100 115 120 1.5 40 98 122 1.8 40 100 a) 6mks On the attached graph paper illustrate the information. All the three curves should be plotted on the same axe. (CO₂ concentration Vs. Rate of photosynthesis) Account for the effect of carbon-dioxide concentration on the rate of photosynthesis at light intensity of 1500. 120 3mks Account for the results obtained at light intensity 10,000 lux 3mks Using the graph explain the general statement known as the law of limiting factors. 3mks e) Briefly explain how an aquatic green plant meets light intensity and carbon dioxide requirements. 5mks 15. The table below shows the results of an experiment carried out by a couple of Form 1 students to measure the rate of photosynthesis at different light intensities and varying carbon dioxide concentrations. The rate was determined by counting the number of bubbles of oxygen released per minute. The temperature was kept constant. Light Intensity (Lux) b) 1500 c) d) 6000 1000 Car bo n Di oxi de Co nce ntr ati on (% 0 0 0.3 0 16 0 52 80 0.6 30 80 100 0.9 1.2 38 40 96 100 115 120 1.5 40 98 122 1.8 40 100 a) 6mks On the attached graph paper illustrate the information. All the three curves should be plotted on the same axe. (CO₂ concentration Vs. Rate of photosynthesis) Account for the effect of carbon-dioxide concentration on the rate of photosynthesis at light intensity of 1500. 120 3mks Account for the results obtained at light intensity 10,000 lux 3mks Using the graph explain the general statement known as the law of limiting factors. 3mks e) Briefly explain how an aquatic green plant meets light intensity and carbon dioxide requirements. 5mks
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