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The diagram shows what happened in an experiment with plant seedlings.
Which characteristic of living things made the seedlings grow towards the light?
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A rat has the scientific name Rattus rattus.
What do the two parts of this name refer to?
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572
Which list contains only arthropods?
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The diagram shows a plant cell.
A biologist wants to find out the number of chromosomes it contains.
Which labelled part should be examined more closely?
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What are leaves examples of?
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Which diagram shows the appearance of a plant cell several minutes after it has been placed in a concentrated solution of sugar?
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Uncooked pieces of potato of identical size were placed in different liquids for one hour and then measured.
Which liquid will cause a decrease in the size of the piece of potato?
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Which food-testing solution shows a positive result when it turns from blue to purple?
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The diagram shows the four types of human tooth.
Which teeth are used for grinding food?
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The diagram shows a plant cell. In which part of the cell does photosynthesis occur?
520
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Which substance found in a healthy diet helps to prevent constipation?
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The graph shows the effect of pH on the activity of an enzyme.
In which part of the alimentary canal would this enzyme be most active?
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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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From which part of a leaf does most water evaporate during transpiration?
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Which blood vessel carries blood to the muscle of the heart?
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The diagram shows the human heart and main blood vessels.
What is the blood vessel labelled X?
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What is a chemical barrier to pathogens?
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What is the site of gas exchange in humans?
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The substances listed are associated with aerobic respiration.
1. carbon dioxide
2. glucose
3. oxygen
4. water
Which substances are the products of aerobic respiration?
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The diagram shows the breathing system.
What are the labelled structures?
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The diagram shows the human excretory system. Which labelled structure is the ureter?
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Which structure transfers information to the central nervous system?
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Examples of responses to hormones are listed.
1 increased breathing rate
2 increased pulse rate
3 growth of body hair
4 widened pupils
Which responses are caused by the hormone adrenaline?
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Which part of the eye focuses light?
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502
The diagram shows a plant shoot growing towards the light.
Which response is shown by the shoot of the plant?
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Which statement about antibiotic use in humans is correct?
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Which conditions are always required for the germination of seeds?
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584
Where do fertilisation and pollination occur in a flower?
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When do the following stages occur in a typical human menstrual cycle? [Table_1]
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The graph shows the number of pregnancies in 4 groups of 100 women. Each group used a different method of contraception.
The method of contraception which is the \textit{most} effective is
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The photograph shows a tiger. Which visible adaptive feature makes the tiger a good predator?
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Which statement about the human sex chromosomes is correct?
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The diagram shows the inheritance of height in pea plants.
Which plants have a heterozygous genotype?
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The graph shows the masses of two different types of tomato.
What can be concluded from the graph?
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Which is an example of a population?
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The diagram shows a food chain in a rock pool.
$$\text{seaweed} \rightarrow \text{whelks} \rightarrow \text{crabs} \rightarrow \text{seagulls}$$
What will happen if the number of secondary consumers increases?
There will be
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What is the role of anaerobic respiration in bread-making?
502
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A crop plant has been genetically modified to make it resistant to herbicides.
Which is a possible disadvantage of introducing this new crop plant?
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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 animal lives in the least polluted water?
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The graph shows four areas of forest that were cut down and then replanted with trees in one part of the world between 1995 and 2015.
Which area of forest was used most sustainably?
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