No questions found
Breathing out combines which two characteristics of living organisms?
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Scientists discover a new species of animal.
It has a segmented body with two pairs of legs on each segment.
To which group of animals does this new species belong?
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The diagram shows an insect.
Use the key to identify the insect.
1 wings present ....................................... go to 2
wings absent ....................................... A
2 two pairs of wings ................................ go to 3
one pair of wings ................................ B
3 wings with circular markings .................. C
wings without circular markings .............. D
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Which feature shows that a cell is a plant cell?
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573
A student drew a large diagram of a leaf as shown.
The drawing measured 160 mm.
The teacher noted that the diagram was twice the size of the leaf.
What was the actual size of the leaf?
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The diagram shows a plant cell which has lost water to its surroundings by osmosis.
Which part is the partially permeable membrane?
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Which identifies the chemical elements found in proteins?
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The graph shows how the activity of an enzyme varies with temperature.
What is the best or optimum temperature for this enzyme and at what temperature is the enzyme not working?
[Table_1]
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Where are carbohydrates made in a green leaf?
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The diagram shows a leaf as seen in cross section under the microscope.
What are tissues 1, 2 and 3?
595
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572
The roots of plants take up nitrates from the soil. What are the nitrates used to make?
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A child decided to eat only meat, oily fish, cheese and bread, and drink only water.
Which nutrient would be in low levels in this diet?
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What is the correct order of the processes that take place in the alimentary canal?
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The diagram shows part of the human alimentary canal. Which organ produces hydrochloric acid?
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The diagram shows the stem of a plant. A strip of the outer tissue including the phloem has been removed.
How is transport in the plant affected?
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After passing through the root hair cells of a plant, what is the next tissue through which water passes?
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The diagram shows part of a cross section through a leaf.
Which arrow shows the direction of movement of water by osmosis in a leaf?
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The graph shows the effect of several minutes of vigorous exercise on heart rate.
When does the person stop doing this exercise?
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The diagram shows human blood cells, as seen under a microscope.
What is the function of cell X?
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A student blows through a straw into limewater. What is the appearance of the limewater before and after blowing through the straw?
552
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569
What is correct for aerobic respiration in muscles?
[Table_1]
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598
To show that a green plant may absorb oxygen, in which condition must it be placed and why?
[Table_1]
588
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514
After a meal containing large amounts of meat, urine is likely to contain
562
500
521
Which of these neurones is found in the peripheral nervous system?
[Table_1]
550
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526
The diagram shows seedlings in two experiments on the tropic response of seedlings to gravity and light.
Experiment 1: to show the effect of gravity, start of experiment in the dark, 3 days later.
Experiment 2: to show the effect of light, start of experiment with light from one side, 3 days later.
How have the seedlings responded?
533
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The diagram shows a flower cut in half.
Which structure receives pollen grains during pollination?
592
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526
The diagrams show four methods of birth control. Which one is placed in the uterus?
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510
What is defined as 'a thread-like structure of DNA, carrying genetic information in the form of genes'?
568
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In mice, the allele for black hair is dominant to the allele for brown hair.
What proportion of offspring will have black hair if a cross is made between a homozygous black mouse and a heterozygous black mouse?
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Which of these human characteristics shows continuous variation?
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The diagram shows the flow of energy through an ecosystem.
What does X represent?
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A herd of red deer live in a woodland, which contains snakes and a large variety of birds. Which group of organisms is an example of a population?
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What is \textit{not} a reason that bacteria are widely used in biotechnology?
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The diagram shows how ethanol can be produced from a sugar solution containing yeast. After five hours the mixture produced bubbles.
What is the main gas in the bubbles?
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The diagram shows part of a food web.
Fishermen regularly catch and remove large fish.
What is most likely to happen to the populations of penguins, small fish and seals?
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The diagram shows the results of a survey on the types of animals found along a stretch of river near to a factory.
Which of the following animals lives in the most polluted water?
540
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