6. Plant nutrition
A section of Biology, 0610
Listing 10 of 508 questions
For Examiner's Use represents the carbon cycle. carbon dioxide in air carbon compounds in plants carbon compounds in fossil fuels carbon compounds in dead organisms carbon compounds in animals A B C D E F Name the process labelled A on . Name a group of organisms that are responsible for the process labelled D on . Which two letters identify respiration on ? Which letter identifies photosynthesis on ? In the box, state the word equation for photosynthesis. For Examiner's Use Suggest reasons why the mean percentage of carbon dioxide in the atmosphere has increased during the last 100 years.
0610_w10_qp_22
THEORY
2010
Paper 2, Variant 2
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For Examiner's Use represents the carbon cycle. carbon dioxide in air carbon compounds in plants carbon compounds in fossil fuels carbon compounds in dead organisms carbon compounds in animals A B C D E F Name the process labelled A on . Name a group of organisms that are responsible for the process labelled D on . Which two letters identify respiration on ? Which letter identifies photosynthesis on ? In the box, state the word equation for photosynthesis. For Examiner's Use Suggest reasons why the mean percentage of carbon dioxide in the atmosphere has increased during the last 100 years.
0610_w10_qp_23
THEORY
2010
Paper 2, Variant 3
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For Examiner's Use shows a carbon cycle. carbon compounds in dead organic matter carbon compounds in animals carbon dioxide in the air carbon compounds in fossil fuels, e.g. oil and coal carbon compounds in green plants F E C D B G A death death death death death death Name the process represented by arrow A. Name the process represented by arrow E. Name one group of organisms responsible for process B. List two environmental conditions needed for process B to occur. Which arrow represents photosynthesis? Complete the word equation for photosynthesis. +  oxygen + This process needs a supply of energy. Name the form of energy needed. For Examiner's Use In an ecosystem the flow of carbon can be drawn as a cycle but the flow of energy cannot be drawn as a cycle. Explain this difference.
0610_w12_qp_21
THEORY
2012
Paper 2, Variant 1
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For Examiner's Use Complete the balanced chemical equation for photosynthesis. light + + chlorophyll A student investigated the effect of increasing the concentration of carbon dioxide on the rate of photosynthesis of Cabomba, an aquatic plant. shows the apparatus that the student used. gas bubble syringe lamp ruler plastic tubing meniscus capillary tubing sodium hydrogencarbonate (NaHCO3) solution Cabomba The concentration of carbon dioxide in the water surrounding the plant was changed by adding different concentrations of sodium hydrogencarbonate solution to the water. The student recorded the time taken for the meniscus to travel 50 mm down the tubing. The rate of photosynthesis was calculated as: rate of photosynthesis = 1000 t where t = time taken in seconds for the meniscus to travel 50 mm. For Examiner's Use The student’s results are shown in Table 4.1. Table 4.1 concentration of sodium hydrogencarbonate solution / mol per dm3 t, time taken for meniscus to travel 50 mm / s rate of photosynthesis (1000/t) 0.00 0.20 0.01 0.40 0.02 0.85 0.05 2.86 0.07 0.10 5.03 Calculate the rate of photosynthesis for the concentration of sodium hydrogencarbonate solution of 0.07 mol per dm3. Write your answer in Table 4.1. Explain why the lamp must be kept at a fixed distance from the syringe. Explain what caused the meniscus to move down the capillary tubing. For Examiner's Use is a partially completed graph of the student’s results. Complete the graph by labelling the axes, adding the missing point and drawing a suitable line. 6.0 5.0 4.0 3.0 2.0 1.0 0.0 0.04 0.06 0.08 0.10 0.00 0.02 For Examiner's Use Explain, using the term limiting factors, the effect of carbon dioxide concentration on the rate of photosynthesis as shown by the student’s results. You will gain credit for using the data in the table and the graph to answer the question.
0610_w12_qp_31
THEORY
2012
Paper 3, Variant 1
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shows part of the carbon cycle. FDUERQ GLR[LGH LQDLU IDHFHV ELVRQ VWUHDP WUHH On draw four labelled arrows to represent the following processes: • one arrow to represent photosynthesis, labelled P • one arrow to represent decay, labelled D • two arrows to represent respiration, each labelled R. shows part of the water cycle. IDHFHV ELVRQ VWUHDP WUHH FORXG On draw two labelled arrows to represent the following processes: • one arrow to represent precipitation, labelled K • one arrow to represent evaporation, labelled E.
0610_w14_qp_23
THEORY
2014
Paper 2, Variant 3
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shows part of the carbon cycle. The arrows represent the processes that take place in the carbon cycle. carbon dioxide in air carbon compounds in dead plants and animals carbon compounds in animals box H E F A B C D Complete by filling in box H. State the process represented by letter C. Draw a line with an arrow on to represent photosynthesis. Label this line G. State the process represented by letter B. State which two letters represent respiration. Write the word equation for aerobic respiration. Explain why every living cell has to carry out respiration.
0610_w15_qp_21
THEORY
2015
Paper 2, Variant 1
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Questions Discovered
508