No questions found
Which process provides an organism with the raw materials needed for tissue repair?
532
510
555
Which name is given to a group of individuals that can reproduce to produce fertile offspring?
597
563
599
An animal has four legs, hair and a tail.
To which group of vertebrates does it belong?
509
572
593
Root hair cells are found on plant roots.
Which feature is present in a root hair cell but not in a sperm cell?
519
538
569
The diagram shows a cross-section of part of a leaf.
Which type of cell carries out the most photosynthesis?
553
549
567
A plant cell is viewed using a microscope with a magnification of $\times 500$. The image of the cell has a width of 20 mm.
What is the actual width of the cell?
512
532
590
Particles can move into and out of cells by diffusion. Which statement about diffusion is correct?
553
535
531
Potato cylinders were put into different concentrations of sucrose solution for the same amount of time. The masses of the potato cylinders were measured before and after being immersed in the solutions. The results are recorded in the table. Which potato cylinder was put into the solution with the highest sucrose concentration?
[Table_1]
503
533
521
Which chemical is used to test for the presence of protein in a food sample?
568
508
596
Which description of an enzyme-catalysed reaction is correct?
584
578
520
The graph shows the effect of temperature on the activity of an enzyme.
At which temperature is the enzyme most active?
534
526
535
Which substance is obtained from the soil?
585
564
522
Which row shows what is needed for photosynthesis?
597
600
524
Which organ secretes hydrochloric acid?
597
561
571
Which statements correctly describe the process of dental decay?
1 Food and bacteria coat the teeth.
2 The bacteria use the sugar in the food for respiration.
3 The bacteria produce acids.
4 The sugar dissolves the enamel.
511
517
509
A piece of bread begins to taste sweet when it is mixed with saliva and chewed for several minutes.
Which substance in saliva causes this change?
541
510
509
The diagram shows a bean seedling soon after it has germinated.
Where is most water absorbed?
568
502
593
Which process occurs during transpiration?
556
521
520
The diagram shows the outside of a human heart.
Which structure is a coronary artery?
539
572
511
The diagram shows a section of a human vein.
What is the function of the part labelled X?
549
596
572
Campylobacter is a bacterium that can cause food poisoning.
Which word describes Campylobacter?
553
561
526
What is the approximate percentage of oxygen in expired air?
557
564
520
Which row shows processes that all use energy from respiration?
[Table showing diffusion, cell division, osmosis, muscle contraction, passage of nerve impulses, and active transport with tick and cross marks]
512
544
518
What is the word equation for anaerobic respiration in yeast?
567
579
555
Which substances are excreted from the human body?
1. carbon dioxide
2. urea
3. water
587
564
525
What is the order of structures that a nerve impulse travels through during a reflex action?
568
541
545
Which structure can reduce how much light enters the eye?
524
590
548
The diagram shows a section through human skin.
What are the structures labelled X, Y and Z?
503
559
570
A disease cannot be treated with antibiotics.
What could be the reasons for this?
1. It is not a bacterial disease.
2. The pathogen is a virus.
3. The patient has become resistant to the antibiotic.
581
560
514
Which statement explains the increased risk of having an accident after consuming excessive alcohol?
553
538
585
The table shows the conditions that four samples of seeds were kept in.
Which sample would germinate?
553
570
512
The diagram shows a cross-section of a flower.
During pollination, which labelled structure releases the pollen and which labelled structure receives the pollen?
565
527
509
Which row shows the results of meiosis?
562
554
503
In a species of plant, the allele for red flower colour, R, is dominant to the allele for yellow flower colour, r.
What would be the flower colour of the offspring of a cross between a parent with the genotype Rr and a parent with the genotype rr?
571
576
539
What is needed for natural selection to take place?
506
563
554
The diagram shows a woodland food web.
Which organisms are secondary consumers?
551
557
518
Which statement describes a population?
593
565
596
Biological washing powders can remove stains from clothes. What must a washing powder contain, to remove an oil stain from a t-shirt?
510
550
572
The diagram shows a sewage treatment process. What is structure X?
575
533
519
