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Which organisms carry out respiration, growth, movement and excretion?
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The diagram shows an animal whose scientific name is _Falco peregrinus_.
To which species does it belong?
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What kind of skin do amphibians have?
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The diagram shows a flowering plant.
Use the key to identify the plant.
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In which part of the cell does aerobic respiration occur?
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Why do some root cells have root hairs?
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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.
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Which part of a plant root hair is partially permeable?
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The table shows the results of food tests carried out on a fruit.
[Table_1]
What did the fruit contain?
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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?
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The equation for photosynthesis is shown.
......1...... + ......2...... \rightarrow glucose + ......3......
Which words correctly complete gaps 1, 2 and 3?
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What is the best source of vitamin C in a balanced diet?
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A young, active woman requires more of which constituent in her diet than a young, active man?
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Which condition could be caused by a lack of iron?
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The diagram shows part of a section through a plant stem.
Which tissue transports water from the roots to the leaves?
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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?
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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?
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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]
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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. Which statement is consistent with the information in the graph?
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Muscles are responsible for the ventilation of the lungs during breathing.
Which row describes their action during the inspiration of air? [Table_1]
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Yeast is able to respire both aerobically and anaerobically. Which statement describes the waste products of yeast respiration?
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The table shows the presence or absence of chemicals in solution in different parts of a healthy kidney.
Which row is correct?
[Table_1: The table includes columns for 'chemical', 'blood plasma in glomerulus', 'fluid entering kidney tubule', and 'fluid in ureter' with options for glucose, protein, salts, and urea each marked as present or absent.]
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Four processes occur when impulses cross a synapse.
P neurotransmitter diffuses across the gap
Q neurotransmitter binds with receptors
R impulse stimulates vesicles
S release of neurotransmitter
What is the correct sequence for these processes?
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Which hormone is involved in the conversion of glucose to glycogen?
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590
The diagram shows the structure of human skin.
What are X, Y and Z?
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A seedling was placed in a horizontal position.
Which diagram shows the result of the gravitropic responses in the seedling?
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Which hormone may be used to improve sporting performance?
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Specific grape varieties are maintained using stem cuttings from mature plants that are then planted and cultivated to produce grapes. This is an example of artificial asexual reproduction. What is a disadvantage of using asexual reproduction to produce fruit?
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Which two statements are correct for the process of cross-pollination in plants?
1 increases potential for variation in offspring
2 pollen is transferred to a different flower on the same plant
3 reduces potential to respond to environmental change
4 pollen is transferred to a flower on a different plant of the same species
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What is a function of the mitochondria in a sperm cell?
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The diagram shows the chromosomes in the nucleus of a body cell in an adult fruit fly.
What are the diploid and haploid number of chromosomes in the fruit fly?[Table_1]
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The diagram shows the phenotypes for blood groups in a family.
Which statement about the genotypes of the parents is correct?
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Sickle-cell anaemia is a genetic disorder which results in severe illness in homozygous individuals. In some human populations being heterozygous can be beneficial.
What could be the reason for this?
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Which statement describes the relationship between evolution and natural selection?
545
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The diagram shows a food chain.
maize → locusts → lizards → snakes
10000 kJ 1000 kJ 100 kJ 10 kJ
What is the efficiency of energy transfer between the maize and the lizards in this food chain?
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The diagram shows part of a food web from a rainforest. In this food web, at which trophic level are the anacondas?
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The diagram shows the structure of a bacterial cell.
The presence of structure X in the bacterial cell is one reason why bacteria are used in genetic engineering.
What is structure X?
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What does *Penicillium* need to grow in a fermenter? [Table_1]
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Deforestation can have a negative impact on the environment.
Which statement about the negative impact of deforestation is correct?
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When nitrates enter a lake they cause rapid growth of algae on the surface of the water. This causes the following changes in the lake:
1 a decrease in the concentration of dissolved oxygen in the water
2 fish and other aquatic animals die
3 an increase in aerobic respiration by decomposers
4 producers die and decomposition increases
In which order do these changes occur?
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