6. Plant nutrition
A section of Biology, 0610
Listing 10 of 508 questions
is a photograph of a strawberry plant growing in a glasshouse. It photosynthesises and produces fruit. State the names of the products of photosynthesis. State the name of the structure in plant cells which contains chlorophyll. Scientists investigated the effect of carbon dioxide concentration on the rate of photosynthesis of strawberry plants grown in a glasshouse. is a graph of the results of the investigation. concentration of carbon dioxide rate of photosynthesis Describe the trend shown in the graph in . The investigation on the effect of carbon dioxide concentration on the rate of photosynthesis was repeated at a higher light intensity. Sketch, on the graph in , a second line to show the expected results of this second investigation. Place ticks (3) in the correct boxes to identify three substances or conditions that would be supplied to the strawberry plants to maximise photosynthesis. glucose lipase magnesium ions warm temperature water very low light intensity Plants are an important part of the water cycle. is a diagram of the water cycle. V S U T Table 1.1 shows the letters from , and descriptions of the stages in the water cycle. Complete Table 1.1 by writing the name of each stage in the correct boxes. Table 1.1 letter from name of stage description of stage S loss of water vapour from plant leaves T heat from the Sun causes liquid water to change into water vapour U water vapour in the air changes to liquid water in the clouds V the liquid water falls to the ground
0610_w20_qp_33
THEORY
2020
Paper 3, Variant 3
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State the word equation for photosynthesis. State the source of energy for photosynthesis. State the name of the structure in a cell where photosynthesis takes place. The effect of carbon dioxide concentration on the rate of photosynthesis in an aquatic plant was investigated. • 10 test-tubes were prepared. Each contained water, an aquatic plant and a different concentration of carbon dioxide. • Each test-tube was placed next to a lamp and the temperature in the test-tubes was maintained at 20 °C. • The number of bubbles produced by each aquatic plant in one minute was counted. shows the apparatus that was used. bubbles test-tube aquatic plant water containing carbon dioxide not to scale lamp The results of the investigation are shown in . 0.00 number of bubbles per minute carbon dioxide concentration / arbitrary units 0.05 0.10 0.15 0.20 State the maximum number of bubbles produced in one minute. The investigator concluded that 0.10 arbitrary units was the optimum concentration of carbon dioxide for photosynthesis in this investigation. Describe the evidence shown in that supports the investigator’s conclusion. The investigation described in 6was repeated but the temperature was reduced from 20 °C to 10 °C. Predict the effect of reducing the temperature on the number of bubbles produced and explain your answer. prediction explanation Carbon dioxide is a greenhouse gas. State the name of one other greenhouse gas.
0610_w21_qp_31
THEORY
2021
Paper 3, Variant 1
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Questions Discovered
508