No questions found
Which characteristic of living organisms is represented by gas exchange in the alveoli?
590
527
567
The binomial name for humans is $Homo\;sapiens$. Which row is correct? [Table_1]
522
587
568
Use the key to identify the stonefly larva.
1. has two cerci at the end of the abdomen............ go to 2
has three cerci at the end of the abdomen............ go to 3
2. abdomen longer than thorax............................... A
thorax longer than abdomen............................... B
3. gills visible on the thorax....................................... C
gills not visible..................................................... D
506
590
502
Which part of a plant cell controls the movement of substances into and out of the cell?
553
524
600
The diagram shows part of a leaf in cross-section.
Structures X and Y are both part of the same
599
508
581
The photograph shows a chloroplast magnified ×7000.
What is the actual size of the chloroplast?
516
558
580
How do carbon dioxide and oxygen move into and out of a mesophyll cell?
587
562
511
What are the features of active transport? [Table_1]
562
502
534
The data show the concentrations of sugar and starch in an onion.
The onion is tested with Benedict's solution and iodine solution.
Which set of results is correct?
550
573
561
The apparatus shown is used for an experiment on starch digestion.
Which test-tube contains the most sugar after 20 minutes?
535
545
561
An experiment was carried out using the apparatus shown. The carbon dioxide content of the water in each test-tube was measured at the start and again three hours later. In which test-tube would there be a decrease in carbon dioxide content?
539
561
580
The diagram shows a cross-section of a leaf.
Which tissue is immediately below the upper epidermis?
574
548
566
The diagram shows part of the alimentary canal.
Which structure produces lipase?
530
529
529
The photomicrograph shows a cross-section through a buttercup root.
What is the function of the tissue labelled Z?
553
585
583
The diagram shows two shoots at the start of an experiment on transpiration.
What are the likely readings on the spring balances after three days?
557
533
585
The diagram shows a circulatory system.
Which vessels carry oxygenated blood?
563
533
552
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?
553
584
590
The graph shows changes in the volume of air in the lungs of a person at rest, over a period of 30 seconds.
Which graph shows changes in the volume of air in the lungs of the same person immediately after they have done five minutes of vigorous exercise?
596
554
556
What is produced by anaerobic respiration in mammals?
554
591
532
Which row describes the functions of the bladder, kidneys and liver? [Table_1]
509
541
520
The diagram shows a reflex arc.
Which label points to the sensory neurone?
548
516
588
The diagram shows the structure of the eye. Which structure refracts light?
556
578
512
What is formed when the nucleus of a sperm fuses with the nucleus of an egg?
548
592
563
The diagram shows the female reproductive system. Where does implantation normally occur?
589
511
527
Which precautions could help to prevent the spread of AIDS?
1. avoiding the mixing of blood
2. using a femidom
3. using the contraceptive pill
4. using a condom
571
506
508
The diagram shows a timeline of a woman's menstrual cycle, which lasts for 28 days.
On which days of the menstrual cycle is a woman most likely to become pregnant?
584
569
594
The diagram shows what happens during fertilisation.
egg + sperm → fertilised egg → male embryo
Which sex chromosomes are present in the egg, sperm and fertilised egg shown?
[Table_1]
501
529
557
Many of the varieties of apple in the world evolved from a single wild species, Malus sieversii.
Which processes were involved in creating thousands of genetically different varieties of apple? [Table_1]
575
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550
The genetic diagram shows a monohybrid cross. B is the dominant allele and b is the recessive allele.
Which of the parents and offspring are heterozygous?
510
587
532
The curve shows the distribution of a human characteristic.
Which characteristic is shown by the curve?
582
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565
A farmer grows different varieties of dates, which are a type of fruit.
The table shows some features of the dates he grows.
[Table_1]
The farmer would like to produce a new variety of date using selective breeding.
He wants a medium sized date that is straw coloured and soft, with a high yield.
Which two varieties could the farmer breed together to get the variety he wants?
548
514
511
The diagram shows a woodland food web.
Which statement is correct?
578
540
565
Which process releases carbon dioxide into the air and which process removes carbon dioxide from the air?
[Table_1]
586
570
549
The graph shows a population growth curve for a species of insect which has been reintroduced to an island from where it had previously become extinct.
How long after reintroduction does the insect population size start to become limited by resources such as food?
513
535
540
Biotechnology is used to produce ethanol for biofuels.
Which type of organism can be used to produce the ethanol?
593
533
532
What is an example of genetic engineering?
598
523
571
What is least likely to result from deforestation?
576
526
502
What could prevent a species from becoming endangered?
566
529
546
