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The diagram shows a leaf on a plant.
Which characteristic of life is represented by this diagram?
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587
Which description of a species is correct?
552
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542
The diagram shows a dolphin.
Dolphins are mammals that live in the sea.
Which row correctly identifies some of the features of dolphins?
[Table_1]
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564
560
Which structures are found in an animal cell?
[Table_1]
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508
What is the function of ciliated cells in the bronchi?
586
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The diagram shows an organism called a copepod. The magnification of the diagram is $\times 30$.
The length of line XY is 45 mm.
What is the actual length of the copepod?
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Some molecules move through a membrane during osmosis.
Which row shows the molecule that moves and the type of membrane?
[Table_1]
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What is a feature of active transport?
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Which substances are made by linking together glucose molecules only?
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Four solutions were tested to see if they contained protein, starch or glucose.
The colours of the solutions after the tests are recorded in the table.
Which solution contained protein and glucose but not starch?
[Table_1]
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573
Which type of biological molecule are enzymes made of?
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The diagrams show molecules involved in the action of a digestive enzyme.
What is the substrate?
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The graph shows how the activity of an enzyme varies with temperature.
What is the optimum temperature for this enzyme, and at which temperature is the enzyme completely denatured?
[Table_1]
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512
An experiment is set up as shown.
The green indicator:
• turns yellow when the carbon dioxide concentration increases
• turns blue when the carbon dioxide concentration decreases.
After several hours, the indicator in test-tube X turned blue. The indicator in test-tube Y remained green.
Which process caused the colour change?
557
557
571
What is a description of transpiration?
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515
The photomicrograph shows a cross-section through a leaf.
Which structure is the cuticle?
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580
What is lacking in the diet of a person with scurvy?
525
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519
What is a part of the small intestine?
556
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506
The diagram shows the apparatus used in an experiment to demonstrate two processes that take place in the body.
After one hour, the water outside the dialysis tubing contained reducing sugars.
Which two processes are represented by this experiment?
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Which row identifies the four types of human teeth shown?
[Table_1]
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548
The diagram shows the human digestive system.
Which letters show where amylase acts during digestion?
581
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524
Which row describes transport in a plant?
[Table_1]
553
528
533
In humans, which structures provide cells with oxygen and nutrients?
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503
The diagram shows part of the human circulatory system.
What are the numbered blood vessels?
[Table_1]
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554
Some methods of transmitting pathogens are listed.
1 drinking contaminated water
2 contact with another person's blood
3 contact with another person's saliva
4 touching contaminated surfaces
How many are indirect methods of transmitting pathogens?
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Which substances are used and produced in aerobic respiration in a plant cell?
[Table_1]
529
571
543
Which organ excretes urea?
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541
559
Which statements about hormones are correct?
1. The ovaries secrete oestrogen.
2. The pancreas secretes adrenaline.
3. The pancreas secretes insulin.
559
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555
The diagram shows a plant shoot growing towards the light.
What is the name of this plant shoot's response to light?
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Parts of an insect-pollinated flower are listed.
1. anther
2. filament
3. stigma
4. style
Which parts are in a carpel?
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536
What is treated with antibiotics?
562
519
570
Which statement describes asexual reproduction?
532
521
510
In humans, why are sperm cells produced in much greater numbers than egg cells?
557
531
592
What is the ball of cells that implants into the lining of the uterus during sexual reproduction in humans?
522
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533
Which sex chromosomes need to be present in a sperm cell to produce a male offspring?
569
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554
ABO blood groups are an example of one type of variation.
What is the cause of this type of variation?
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586
Which statement is an example of natural selection?
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554
The graph shows the increase in the human population of the world since 1630.
What was the longest time taken for the population to double?
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526
Lichens are organisms that do not grow well in polluted air.
Which graph shows the change in the number of lichen species from the centre of a polluted city to the unpolluted countryside 15 km away?
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564
Which trophic level describes an organism that only eats herbivores?
549
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566
