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Which process releases water and energy?
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The dire wolf is an extinct species of wolf.
What is the correct scientific name for this wolf?
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Which of the animals shown is a crustacean?
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The diagram shows a type of plant cell.
Where does this type of cell come from?
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Which structures are found in a white blood cell? [Table_1]
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The diagram shows the structure of a plant cell.
This cell is part of a tissue which
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A student made the following statements about the movement of ions by active transport.
1 It is the net movement of particles from a low concentration to a high concentration.
2 It is the net movement of particles from a high concentration to a low concentration.
3 It requires the use of energy.
4 It can only take place in living, respiring cells.
Which statements are correct?
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Which diagram shows the appearance of a plant cell after it is placed in pure water?
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What is the colour change shown by Benedict’s solution when heated with a reducing sugar?
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Into which part of the alimentary canal is the enzyme that digests starch secreted?
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Which of these is digested by protease?
Key:
■ amino acid
● glucose
― chemical bond
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What must be increased in the diet of a person suffering from constipation?
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The diagram shows the human alimentary canal, with a string marked in metres beside it.
How long is the small intestine?
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A person has swollen, bleeding gums and slow wound healing. This could be caused by a lack of which nutrient in a diet?
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Which function is performed by the duodenum?
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Solid food enters the mouth at P and enters the oesophagus at Q. How does the food at Q differ from the food at P?
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What is a description of transpiration?
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Which words correctly complete the following two sentences?
During transpiration, water moves from the ......1...... in a leaf and passes into ......2...... cells. It then leaves the surface of these cells by ......3...... and ......4...... out of the stomata. [Table_1]
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The diagram shows a cross-section through a human blood vessel.
Which type of blood vessel does the diagram show?
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The photomicrograph shows some blood cells. What is the function of cell P?
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What can be passed from one person to another during blood transfusion?
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The diagram shows some structures in the human thorax (chest).
From which part does most oxygen pass directly into the blood?
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In an experiment to investigate anaerobic respiration, two bottles are set up in a warm room, as shown.
What would happen to each balloon after one day?
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The diagram represents the exchange of gases during breathing and during respiration in the body.
What is represented by X and by Y?
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What is the most important function of sweating?
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A student begins to lose control of her bicycle while travelling down a hill at speed.
The concentration of which substance will begin to increase rapidly in her blood?
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What shows the order in which these structures are involved in a reflex action?
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The diagram shows a person sweating in hot weather.
What part is played by sweat glands during the process of sweating?
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Which row states the possible harmful effects of tobacco smoke? [Table_1]
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Which method of birth control works by preventing an egg from being released?
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Which environmental factor is not always a requirement for seed germination?
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The diagram shows half a flower.
After pollination, where would pollen grains be found?
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A pure-breeding white rat was crossed with a pure-breeding black rat. All their offspring were black.
One of the offspring was bred with a pure-breeding white rat.
What is the most likely percentage of black rats in the offspring?
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A tall pea plant is crossed with a short pea plant. All the offspring plants are tall. What are the genotypes of the tall parent plant and the offspring? [Table_1]
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What is a mutation?
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Which two processes both result in increased water vapour in the atmosphere?
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The diagram shows a food web.
What do the arrows represent?
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The diagram shows part of a food web.
What is most likely to increase the size of the frog population?
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The diagram shows a bacterial cell that will be used to produce human insulin.
What is inserted into gap Q?
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The table shows the amount of carbon dioxide in the atmosphere in three different years.
[Table_1]
What is the most likely cause of this change?
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