No questions found
Which organisms carry out respiration, growth, movement and excretion?
543
580
511
The diagram shows an animal whose scientific name is *Falco peregrinus*.
To which species does it belong?
592
599
512
What kind of skin do amphibians have?
574
507
587
The diagram shows a flowering plant.
Use the key to identify the plant.
506
583
561
The diagram shows a plant cell. In which labelled part of the cell is sugar made?
532
571
562
Why do some root cells have root hairs?
588
506
550
Which words correctly complete the paragraph?
Diffusion may be defined as the net movement of particles from a region of their ......1...... concentration, to a region of their ......2...... concentration, where movement is ......3...... a concentration gradient.
527
540
505
Which part of a plant root hair is partially permeable?
590
532
530
The table shows the results of food tests carried out on a fruit.
[Table_1]
What did the fruit contain?
547
514
561
An experiment was carried out to investigate the effect of pH on enzyme action. The graph shows the results.
What are the labels for the x-axis and the y-axis?
600
560
511
The equation for photosynthesis is shown.
......1...... + ......2...... \( \rightarrow \) glucose + ......3......
Which words correctly complete gaps 1, 2 and 3?
[Table_1]
558
559
501
What is the best source of vitamin C in a balanced diet?
533
542
518
A young, active woman requires more of which constituent in her diet than a young, active man?
512
584
519
Which condition could be caused by a lack of iron?
500
544
544
The diagram shows part of a section through a plant stem.
Which tissue transports water from the roots to the leaves?
591
550
559
Petroleum jelly is waterproof and transparent. Covering the underside of the leaves of a plant with a thin layer of petroleum jelly will slow down the rate of water loss from the plant. Which statement explains this?
559
557
575
The diagram shows the human heart.
In which order does blood pass through the chambers during a complete circuit of the body after it returns from the lungs?
530
504
591
The diagrams show some components of the blood of a mammal. Which component causes the blood to start clotting?
541
576
565
Which statement describes a transmissible disease?
559
508
513
A sample of expired air is collected in a gas jar. Another gas jar contains normal atmospheric air.
A lighted candle is placed inside each gas jar as shown. The time taken for each flame to go out is measured. As the candles burn, they use up the oxygen available in the jar.
The table shows the results of this experiment.
[Table_1: gas jar | X | time for candle flame to go out / s | 15 | gas jar | Y | 9]
What is an explanation of the difference between the results in jars X and Y?
514
536
516
Which row describes anaerobic respiration?
[Table_1]
532
572
544
The diagram shows the excretory system.
What is structure X?
541
541
548
Which hormone is involved in the conversion of glucose to glycogen?
598
562
507
Which mechanism for maintaining body temperature involves the action of muscles?
560
519
595
Antibiotics are used to treat some diseases.
Which diseases could they be effective against?
[Table_1]
580
554
532
The graph shows the number of people infected with HIV, in one part of the world, between 1985 and 2010.
Using data from the graph, which statement is correct?
548
552
591
The diagram shows reproduction in a potato plant. Potato X was planted into the ground and a plant grew from it. The plant then produced potato Y.
Which statement is correct?
577
552
526
Which row correctly links the named process with its description? [Table_1] | process | description | |----------------|------------------------------------------| | A. menstruation| release of an egg | | B. menstruation| shedding of the lining of the uterus | | C. ovulation | fusion of nuclei | | D. ovulation | start of puberty |
502
581
526
The human immunodeficiency virus (HIV) can be transmitted in body fluid.
Some examples of body fluids are listed.
1. blood
2. saliva
3. semen
4. tear fluid
Which body fluids could transmit HIV?
541
528
512
Which method of birth control involves a surgical procedure?
509
571
584
The diagram shows the inheritance of sex in humans.
[Table_1]
What is the chance of the couple’s next child being male?
573
528
585
What will cause the rate of mutation to increase?
557
534
548
A feature of some plants that live in dry places is that the leaves are reduced to spines.
What is an advantage of the leaves being reduced to spines?
587
516
502
Black truffle is a fungus that obtains nutrients from the roots of hazel trees. Female pigs find and eat the fungi.
What is the principal source of the energy for this food chain?
566
523
589
The diagram shows a food chain.
apple tree $\rightarrow$ herbivorous insects $\rightarrow$ carnivorous insects $\rightarrow$ bird
Which pyramid of numbers represents the food chain?
577
561
581
Some washing powders are called biological washing powders.
What is the reason for this?
546
550
597
What is an example of genetic engineering?
582
515
564
What is a negative impact to an ecosystem of large-scale monoculture?
584
512
521
