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The diagrams show a test-tube containing pond water. The green colour is caused by microorganisms that have chloroplasts.
Which characteristics of living organisms are shown?
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Which shows an organism that has been named using the binomial system?
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The diagram shows an arthropod.
To which group does it belong?
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Which features do animal cells share with plant cells? [Table_1]
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The diagram shows an animal.
Use the key to identify the animal.
1 wings present ........................... go to 2
wings absent ........................... go to 3
2 one pair of wings visible .................... A
two pairs of wings visible .................... B
3 three pairs of legs ......................... C
four pairs of legs ............................ D
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At which level of organisation is a root?
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Some pieces of potato were placed in a very concentrated sugar solution. Other pieces of potato were placed in distilled water.
What happened to the mass of the potato pieces in the two liquids?
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Which identifies the chemical elements found in proteins?
[Table_1]
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A student carries out a test to see whether the solution in a test-tube contains protein.
Which row shows the correct food test and a positive result?
[Table_1]
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The diagram shows an experiment investigating the effect of light intensity on an aquatic plant.
Photosynthesis occurred in both test-tube P and test-tube Q. Both test-tubes were kept at the same temperature. The number of bubbles produced in test-tube P was 12 bubbles per minute.
What is the most likely number of bubbles produced in one minute in test-tube Q?
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In which situation would insulin secretion usually increase?
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The pie charts show the composition of 100g of four different foods.
Which food provides the most energy?
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The diagram shows the digestive system.
Where does egestion take place?
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The diagram shows an experiment kept at room temperature. What is present in the water surrounding the membrane after 45 minutes?
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The diagram shows an experiment to investigate transpiration.
Plant 1 is not covered. Plant 2 and its pot are covered by a transparent plastic bag.
The mass of each plant and its pot is measured. The masses are measured again after two hours.
What is the result?
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The diagram shows a vertical section through a human heart.
What are X and Y? [Table_1]
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Which factor increases the risk of developing coronary heart disease?
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The body has several defence mechanisms to protect the body against disease.
Which is a chemical barrier?
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The diagram shows part of the human gas exchange system.
Which row identifies P, Q and R?
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When is respiration carried out by green plants?
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Which process releases the most energy from one molecule of glucose?
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The diagram shows a simple reflex arc.
What is the correct order of events after the knee is tapped?
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The diagram shows the eye of a person in a brightly-lit room.
What happens to distance P and distance Q when this person moves from the brightly-lit room into a dark room?
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The diagram shows a leaf as seen in cross-section under the microscope.
What are tissues 1, 2 and 3?
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A patient has dye injected into the blood supply to his kidneys. The dye appears in his excretory system as shown.
Which part is blocked?
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What is essential for the germination of all seeds?
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The diagram shows the female reproductive system. Where does fertilisation normally occur?
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The graph shows the decline in testosterone production as men get older.
Which age range shows the greatest decline in testosterone production?
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A man has three sons.
What is the chance of his next child being a daughter?
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559
Which statements about meiosis are correct?
[Table 1]
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In a plant species, the allele for red flowers, R, is dominant to the allele for white flowers, r. Homozygous red-flowered plants, RR, are crossed with homozygous white-flowered plants, rr.
What is the colour of the flowers produced by the offspring of this cross?
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Different organisms have different adaptive features. For example, the anthers of wind-pollinated flowering plants have long filaments.
What is true of this adaptive feature?
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The statements describe aspects of selective breeding and natural selection.
Which statement applies only to selective breeding?
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Which diagram correctly shows the flow of energy?
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The diagram shows a food chain.
Which organism is the secondary consumer?
[Image_1: A -> B -> C -> D]
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Which process is part of the carbon cycle?
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What is an example of genetic engineering?
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What are the possible effects of deforestation? [Table_1]
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The bloodworm is an organism that is found in heavily polluted water.
The diagram shows where raw sewage flows into a river.
Where would there be fewest bloodworms?
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