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Which organisms carry out respiration, growth, movement and excretion?
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597
The diagram shows an animal whose scientific name is Falco peregrinus.
To which species does it belong?
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510
What kind of skin do amphibians have?
596
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585
The diagram shows a flowering plant.
Use the key to identify the plant.
523
534
589
In which part of the cell does aerobic respiration occur?
599
512
536
Why do some root cells have root hairs?
574
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550
The table shows the concentration of gases in a blood vessel and in an alveolus.
Which row shows the conditions that cause a gas produced in respiration to diffuse from the blood vessel into the alveolus?
[Table_1]
523
560
532
Which part of a plant root hair is partially permeable?
547
532
596
The table shows the results of food tests carried out on a fruit.
[Table_1]
What did the fruit contain?
536
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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?
557
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581
An experiment is set up as shown.
The green indicator turns yellow when the concentration of carbon dioxide increases. The green indicator turns blue when the concentration of carbon dioxide decreases.
After several hours, the indicator in test-tube X turned blue. The indicator in test-tube Y remained green.
Which process caused the colour change?
509
501
572
In which part of the alimentary canal do chemical digestion and mechanical digestion take place?
569
519
554
The diagram shows part of the alimentary canal.
Where is most water absorbed?
543
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A celery stalk was placed in a beaker which contained a red stain. After 24 hours, the red stain appeared at the top of the celery stalk.
Which structures stained red?
554
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A student is investigating the effect of temperature on the rate of transpiration. Which environmental conditions should be kept constant during this investigation?
[Table_1: Table showing environmental conditions with checkmarks for constants: humidity, light intensity, temperature, wind speed]
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A student places two samples of crushed apple into two beakers, P and Q. The samples are of equal size. She adds 5 cm3 of pectinase solution to beaker P and 5 cm3 of water to beaker Q. After five minutes, she places the samples of crushed apple into two different filter funnels, and measures the volume of juice filtering through from each sample over a period of 10 minutes. Which graph shows her results?
558
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During the process of blood clotting, damage to blood vessels stimulates L, and M is converted to N.
What are L, M and N?
[Table_1]
542
570
593
A child is vaccinated against measles. After a period of time the child is infected with the measles virus.
The graph shows the concentration of measles antibodies in the child’s bloodstream during this time.
[Graph displaying the antibody concentration in the blood over time]
Which statement is consistent with the information in the graph?
532
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504
Muscles are responsible for the ventilation of the lungs during breathing.
Which row describes their action during the inspiration of air? [Table_1]
551
541
581
Aerobic respiration involves the breakdown of glucose.
$C_{6}H_{12}O_{6} + \cdots x \cdots O_{2} \rightarrow \cdots y \cdots H_{2}O + \cdots z \cdots CO_{2} + \text{energy}$
Which values for \( x \), \( y \) and \( z \) balance the equation?
[Table_1]
557
588
575
The composition of the blood in the renal vein is different to the composition of the blood in the renal artery.
What substance has a higher concentration in the renal vein than in the renal artery?
559
577
552
The diagram shows the structures in a reflex arc.
What is X?
550
574
563
Which row describes accommodation when viewing a near object?
[Table_1]
599
530
514
Hormones and the nervous system both control our bodies.
Which statement about the control provided by our hormones is correct?
514
593
535
What is an advantage, for an organism, of using asexual reproduction?
504
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The diploid number in (sheep) is 54. How many chromosomes will there be in a zygote of this species?
523
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573
Which adaptive feature of sperm provides the energy that enables it to swim?
586
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Two hormones, X and Y, are secreted by the ovaries. The graph shows the concentrations of these hormones in the blood during one complete menstrual cycle.
What are hormones X and Y?
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508
The mitotic index of a tissue is the percentage of cells in a tissue that are undergoing division.
The table shows the number of cells in two tissue samples, X and Y.
[Table_1]
Which statement is correct?
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500
Some features of cell division are listed.
1. haploid cells are produced
2. new cells are genetically identical
3. reduction division
4. results in variation
Which features would be associated with meiosis?
544
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541
Sickle-cell anaemia is an inherited disease.
Which genotypes represented in the diagram would increase an individual's resistance to malaria?
530
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570
Fitness is defined as the probability of an organism ......1...... and ......2...... in the environment in which it is found.
Which words correctly complete gaps 1 and 2?
568
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501
A food chain has the pyramid of numbers shown.
[Image_1: Pyramid of Numbers]
What is the pyramid of biomass for the same food chain?
596
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599
The graph shows the changes in a population of brine shrimp over a period of time. Over which section or sections is the birth rate greater than the death rate?
500
579
560
What is a disadvantage of using bacteria to produce human insulin?
544
510
578
The diagram shows a bacterial cell containing a plasmid.
What is inserted into the plasmid if this cell is to be used for the production of insulin?
502
545
587
What would be unlikely to increase the risk of human famine?
509
547
501
Since 1970 sulfur dioxide emissions have dropped by 95% in some parts of the world.
What is the main reason for the reduction in emissions?
566
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501
