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1

Which characteristic do all living organisms show?

1. Characteristics and classification of living organisms  →  1.1. Characteristics of living organisms

1. Characteristics and classification of living organisms  →  1.3. Features of organisms

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2

What can be found in both root hair cells and xylem vessels?

8. Transport in plants  →  8.2. Water uptake

8. Transport in plants  →  8.1. Xylem and phloem

2. Organisation of the organism  →  2.1. Cell structure

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3

The diagram shows an animal. Use the key to identify the animal. front limbs with five fingers go to 2 front limbs with four fingers go to 3 skin with spots A skin without spots B tail with fins C tail without fins D

1. Characteristics and classification of living organisms  →  1.3. Features of organisms

14. Coordination and response  →  14.4. Homeostasis

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4

How does oxygen move from the alveoli into the blood?

3. Movement into and out of cells  →  3.2. Osmosis

3. Movement into and out of cells  →  3.1. Diffusion

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5

The diagram shows a liver cell. In which way does this cell differ from a typical animal cell?

2. Organisation of the organism  →  2.1. Cell structure

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6

Which row shows the main tissue and organ involved in the process?

2. Organisation of the organism  →  2.1. Cell structure

16. Reproduction  →  16.3. Sexual reproduction in plants

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7

Which structure is not an organ?

14. Coordination and response  →  14.2. Sense organs

2. Organisation of the organism  →  2.1. Cell structure

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8

Which process occurs by osmosis?

3. Movement into and out of cells  →  3.2. Osmosis

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9

Red blood cells were placed in a dilute solution. Movement of water across the cell membrane caused a change in their appearance. What explains this movement?

3. Movement into and out of cells  →  3.2. Osmosis

8. Transport in plants  →  8.3. Transpiration

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10

What happens to most enzymes above 60 °C?

5. Enzymes  →  5.1. Enzymes

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11

The enzyme catalase, found in potato, speeds up the breakdown of hydrogen peroxide. The reaction releases a froth of oxygen bubbles. The diagram shows an experiment to find the effect of changes in pH on the rate of this reaction. froth of oxygen bubbles piece of potato dilute hydrogen peroxide solution The table shows the time taken for the froth of bubbles to reach the top of the test-tube at different pH values. pH minutes Which pH is nearest to the optimum for this enzyme?

5. Enzymes  →  5.1. Enzymes

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12

Which food-testing reagent shows a positive result when it turns from blue to purple?

4. Biological molecules  →  4.1. Biological molecules

5. Enzymes  →  5.1. Enzymes

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13

Which two substances are needed for photosynthesis?

6. Plant nutrition  →  6.1. Photosynthesis

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14

Some liquid is collected from the xylem in the stem of a plant. What is present in the liquid?

8. Transport in plants  →  8.1. Xylem and phloem

3. Movement into and out of cells  →  3.2. Osmosis

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15

In which list do all three blood vessels carry oxygenated blood?

9. Transport in animals  →  9.3. Blood vessels

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16

In a person with a low platelet level, which process is slower than normal?

9. Transport in animals  →  9.4. Blood

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17

The table shows some characteristics of four different plants. The plants are growing in the same environmental conditions. Which plant will have the highest rate of transpiration?

8. Transport in plants  →  8.3. Transpiration

6. Plant nutrition  →  6.2. Leaf structure

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18

Four metabolic reactions are shown...

12. Respiration  →  12.3. Anaerobic respiration

12. Respiration  →  12.2. Aerobic respiration

6. Plant nutrition  →  6.1. Photosynthesis

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19

The oxygen carrying capacity of the blood of smokers is less than that of non-smokers. Which component of cigarette smoke causes this?

11. Gas exchange in humans  →  11.1. Gas exchange in humans

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20

Why is yeast used in bread-making?

21. Biotechnology and genetic modification  →  21.2. Biotechnology

12. Respiration  →  12.3. Anaerobic respiration

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21

The table shows the percentage composition of some chemicals found in blood entering the kidney of a healthy person. chemical composition in blood entering kidney / % glucose 0.10 protein 8.00 urea 0.03 What is the percentage composition of the same chemicals in the urine of a healthy person?

13. Excretion in humans  →  13.1. Excretion in humans

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22

The diagram shows part of the human circulatory system. In which vessel do the break-down products of hormones first appear?

14. Coordination and response  →  14.3. Hormones

9. Transport in animals  →  9.3. Blood vessels

13. Excretion in humans  →  13.1. Excretion in humans

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23

Which target organ releases glucose into the blood-stream as a result of the action of adrenaline?

14. Coordination and response  →  14.3. Hormones

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24

Which responses are shown...

14. Coordination and response  →  14.5. Tropic responses

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25

The diagram shows a flower in vertical section. Which numbered parts of the flower continue to develop after fertilisation?

16. Reproduction  →  16.3. Sexual reproduction in plants

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26

The diagram shows a cell dividing into two. DNA strand DNA strand Which process is shown...

17. Inheritance  →  17.2. Mitosis

16. Reproduction  →  16.1. Asexual reproduction

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27

Some bean seeds are planted 2 cm below the surface of some soil in a tray. Which process will not occur as the seeds start to germinate?

16. Reproduction  →  16.3. Sexual reproduction in plants

3. Movement into and out of cells  →  3.2. Osmosis

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28

What may be defined as ‘an increase in dry mass’?

1. Characteristics and classification of living organisms  →  1.1. Characteristics of living organisms

19. Organisms and their environment  →  19.4. Populations

12. Respiration  →  12.3. Anaerobic respiration

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29

The chart shows the inheritance of fur colour in a small mammal. If the allele for white fur is dominant, which animal must be heterozygous for the gene controlling fur colour?

17. Inheritance  →  17.4. Monohybrid inheritance

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30

The diagram shows the chromosomes from one person. What can be deduced about the person who has these chromosomes?

17. Inheritance  →  17.1. Chromosomes, genes and proteins

17. Inheritance  →  17.4. Monohybrid inheritance

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31

The diagram shows a plant that is producing small plantlets. plantlet flower Which statement about the plantlets is correct?

16. Reproduction  →  16.3. Sexual reproduction in plants

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32

Which diagram shows energy passing along a food chain?

19. Organisms and their environment  →  19.2. Food chains and food webs

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33

The diagram shows a food web. green plants grasshoppers toads greenfly snails beetles birds lizards squirrels snakes Which organisms will increase in number, if the number of snakes increases?

19. Organisms and their environment  →  19.2. Food chains and food webs

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34

The diagram shows some feeding relationships in a woodland area. Which of the labelled animals are in competition with seed-eating insects for their food?

19. Organisms and their environment  →  19.2. Food chains and food webs

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35

Which process does not release water?

8. Transport in plants  →  8.3. Transpiration

3. Movement into and out of cells  →  3.2. Osmosis

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36

The diagram shows the carbon cycle. Which process produces carbon dioxide from substances made by photosynthesis millions of years ago?

6. Plant nutrition  →  6.1. Photosynthesis

19. Organisms and their environment  →  19.3. Nutrient cycles

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37

Which statement about population growth is correct?

19. Organisms and their environment  →  19.4. Populations

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38

The graph shows changes in part of a lake after it has been polluted by fertilisers from a nearby farm. At which time will the oxygen concentration in the water be lowest?

20. Human influences on ecosystems  →  20.3. Pollution

6. Plant nutrition  →  6.1. Photosynthesis

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39

The concentration of a pesticide in the tissues of the organisms in the following food chain was measured. plants → small fish → large fish → birds of prey Which bar on the chart represents the large fish?

19. Organisms and their environment  →  19.2. Food chains and food webs

20. Human influences on ecosystems  →  20.1. Food supply

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40

Which activity will be least likely to lead to the extinction of species?

20. Human influences on ecosystems  →  20.4. Conservation

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