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The diagrams show a plant at the start of an experiment, and the same plant two weeks later.
Which characteristics of living organisms are demonstrated by this experiment?
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Donkeys and zebras are different species. They can breed to produce an animal called a zedonk.
Zedonks are not fertile.
Which statement is correct?
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Which feature is characteristic only of birds?
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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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Which process requires energy from respiration?
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Which identifies the chemical elements found in proteins?
[Table_1: See table above]
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Enzyme X digests protein in the stomach.
Four test-tubes were set up, each contained the same amounts of protein and enzyme X. The test-tubes are kept at different levels of pH and temperature, as shown in the table.
In which test-tube will protein digestion be quickest?
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Which substance is used up in photosynthesis?
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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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The pie charts show the composition of 100g of four different foods.
Which food provides the most energy?
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In which part of the alimentary canal is most water absorbed?
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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 a cross-section through a plant root.
What is found at Q and R?
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The diagram shows a vertical section through a human heart.
What are X and Y?
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The table shows the concentration of red blood cells, white blood cells and platelets in the blood of four patients.
Which patient is most likely to have a deficiency of iron in their diet \textbf{and} will find it difficult to form a blood clot?
[Table_1]
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Campylobacter is a bacterium that can cause food poisoning.
Which word describes Campylobacter?
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What is the sequence of structures through which a molecule of oxygen passes from the air to the blood of a person?
1 bronchiole
2 capillary
3 alveolus wall
4 larynx
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Which process releases heat to maintain a constant body temperature?
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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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When a bright light is shone into the eye, the diameter of the pupil decreases. What is this an example of?
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The diagram shows a seedling, fixed to a rotating platform. Light is directed from one side only.
The platform was allowed to rotate for two days. It was left stationary for a further two days.
Which diagram shows the appearance of the seedling after this four-day period?
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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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The diagram shows reproduction in a potato plant.
Which process is shown?
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The diagram shows part of a flower. Where does fertilisation occur and where are the ovules and pollen grains found? [Table_1]
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Which method of birth control can be used as a barrier to sperm and sexually transmitted diseases during sexual intercourse?
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The diagram shows a plant cell. Where are the chromosomes found?
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Which statement describes human cells formed by meiosis?
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Pea plants have two alleles for height. T is tall, t is short.
Two heterozygous pea plants, Tt, are crossed.
What is the phenotypic ratio of the offspring for this cross?
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The graph shows the heights of humans. Which statement is correct?
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What is a mutation?
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Consumers take in carbon atoms from their food.
How do carbon atoms leave the consumers?
[Table_1] with key showing \( \checkmark \) = yes and \( \times \) = no
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Which process is part of the water cycle?
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A gene for insulin is taken from a human cell and placed in a bacterium.
The bacterium can then make human insulin.
What is this process called?
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Some examples of how areas of land may be used are listed:
1. food crop production
2. grazing cattle
3. house building
4. tree planting.
Which uses of land will cause habitat destruction?
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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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