No questions found
All living things can remove toxic materials and other substances that are in excess of requirements. What is this process called?
578
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600
The table shows features of some animals.
Which animal is a mammal?
[Table_1]
Key:
✓ = present
✗ = absent
568
566
561
The diagram shows an animal.
What is the animal?
1. animal with a vertebral column .......................................... vertebrate
animal with an exoskeleton ............................................ go to 2
2. no distinct head, thorax and abdomen ............................... A
distinct head, thorax and abdomen .................................... go to 3
3. eye occupies less than one third of the head .................. B
eye occupies more than one third of the head ................ go to 4
4. wings are wider than they are long ................................... C
wings are longer than they are wide .................................. D
565
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The diagram shows some tissues in part of a plant root. The arrows represent the movement of water into and across the plant root tissues.
How many different tissues are shown?
507
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546
The diagram shows some cells.
Where are these cells found?
542
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565
The diagram shows a beetle.
The actual size of the beetle between X and Y is 15 mm.
What is the magnification of the image?
512
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577
Which statement about diffusion is correct?
529
579
522
The cells in a plant root have a higher concentration of magnesium ions than in the surrounding soil.
Which process will move the magnesium ions into the root?
525
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515
In a photosynthesis experiment, a plant is left in bright sunlight for several hours. A leaf is then removed from the plant and tested for starch, using iodine solution.
The diagram shows the leaf from the plant that was used in the experiment.
Which diagram shows the result of the experiment?
598
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575
An experiment was carried out to investigate the effect of pH on enzyme action. The graph shows the results.
[Image_1: Graph]
What are the labels for the x-axis and the y-axis?
[Table_1: Options Table]
564
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591
Four test-tubes were set up as shown in the diagram.
In which test-tube is the starch digested most quickly?
547
561
512
The diagram shows a cross-section through a leaf.
What is the structure labelled X?
579
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578
The diagram shows the surface view of part of the epidermis of a leaf. How many guard cells are present?
565
579
568
What is the dietary importance of carbohydrates?
521
586
556
The diagram shows a large food molecule changing into smaller molecules.
What is process X?
549
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526
The diagram shows part of the alimentary canal and associated organs. Where does most water absorption take place?
506
543
518
598
539
530
Which graph shows the effect of increasing humidity on the rate of transpiration?
569
512
551
The diagram shows a section through a mammalian heart. Which part carries blood directly from the lungs?
588
503
520
The diagram shows the four components of blood separated into layers. Which component is labelled with the correct function?
592
566
521
Some features that help to defend the body against pathogens are listed.
1. mucus
2. skin
3. stomach acid
4. phagocytosis
Which features can prevent pathogens entering body tissues?
582
549
516
Which shows the correct order of structures that air travels through when a human breathes in?
555
570
517
Which chemicals are needed to release energy in aerobic respiration?
516
512
507
Yeast is an organism used in the production of biofuels. Which statement describes why yeast is used for biofuel production?
529
545
537
The diagram shows part of the excretory system of a female mammal. What is tube X?
553
547
515
The structures listed are part of the nervous system.
1 brain
2 effector
3 receptor
4 relay neurone
In a reflex arc, which structures are connected to a motor neurone by synapses?
572
550
508
A student investigated the effect of changing light intensity on pupil diameter in the eye. The table shows the results.
[Table_1]
Which explanation for the student’s results is correct?
555
568
520
A seed is placed and grown on a rotating disc, as shown.
Which diagram shows the appearance of the seedling shoot after seven days?
534
563
593
Which substance can be used to treat a bacterial infection?
503
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Fertilisation is defined as the fusion of the ……X…… of two gametes to form a ……Y…….
Which row completes the sentence?
[Table_1]
549
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What is the correct description of pollination?
559
513
552
HIV is a sexually transmitted infection (STI).
Which methods could be used to reduce the spread of HIV?
1. breast-feed babies
2. education about how HIV is spread
3. provide easy access to condoms
4. provide needle exchange schemes for drug users
565
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572
Part of a tree branch is broken off and planted in the soil. A new tree grows from the branch.
Which row is correct?
[Table_1]
504
539
551
A species of insect usually has pale-coloured wings. This helps to camouflage them on pale-coloured tree trunks. A few of the insects in this species have darker coloured wings. After a number of years the tree trunks become darker in colour due to environmental changes. The insects with dark-coloured wings become more common than insects with pale-coloured wings in this species. Which process causes this change in the proportion of insects with dark-coloured wings?
572
572
548
The diagram shows a food chain.
grass \rightarrow grasshopper \rightarrow frog \rightarrow snake \rightarrow hawk
What is the tertiary consumer in this food chain?
586
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510
The diagram shows the water cycle.
The table shows the processes involved in the water cycle.
Which row is correct?
[Table_1]
574
571
517
Which process releases carbon dioxide into the atmosphere?
566
500
557
What is the useful product of anaerobic respiration in the manufacture of bread?
580
554
581
What are reasons why species become endangered?
516
577
586
