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Which processes are characteristics of all living organisms? 1. digestion 2. respiration 3. excretion
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Using the binomial system, the Arctic fox is called \textit{Vulpes lagopus}. Which row is correct? [Table_1]
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The diagrams show four different types of arthropod.
Which organism is labelled with its correct arthropod group?
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Which features are possessed by all plant cells? [Table_1]
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The diameter of an egg is 6.5 cm. A student draws the egg. The diameter of the egg in the drawing is 19.5 cm.
What is the magnification of the drawing?
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The diagram shows an experiment to investigate osmosis in living cells.
What happens to the volumes of water and sugar solution after 12 hours?
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Which process causes oxygen to pass from an alveolus in the lung into a blood capillary?
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Which row identifies the chemical elements in proteins? [Table_1]
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The table shows some large biological molecules and some small biological molecules.\n[Table_1]\nWhich rows correctly pair large molecules with the smaller molecules used to make them?
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Which changes could cause an enzyme to denature?
1. change in pH
2. change in temperature
3. change in substrate concentration
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Which features of a leaf allow more diffusion of carbon dioxide into the palisade cells for photosynthesis? [Table_1]
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The diagram shows a cell with groups of bacteria around its edge. The bacteria have moved to areas of high oxygen concentration. Which process in the cell causes the bacteria to form these groups?
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The diagram shows the teeth in the lower jaw of a human. Which tooth is a premolar?
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Some medicines are made into tablets which are coated in a starch-like substance. The coating protects the medicine from the effects of gastric juice. Which enzyme digests the coating and what is produced by this action? [Table_1]
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In which part of the alimentary canal are most nutrients absorbed into the blood?
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From which part of a leaf does \textbf{most} water evaporate during transpiration?
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The photograph shows a cross-section through a sunflower stem. What is the name and function of the tissue labelled Z?
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What ensures the one-way flow of blood in the human circulatory system?
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In which row is the component of blood correctly linked to its function? [Table_1]
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Which statement describes a transmissible disease?
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What is the composition of expired air compared with inspired air? [Table_1]
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The diagram shows the human breathing system.
What are the labelled structures?
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Yeast cells can convert glucose into alcohol and carbon dioxide. Which statement about this process is correct?
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In an experiment to investigate anaerobic respiration, two bottles are set up in a warm room, as shown in . Bottle P contains sugar, yeast, and water, while bottle Q contains yeast and water. What would happen to each balloon after one day?
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Which row shows an organ and the substance it excretes?
[Table_1]
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The diagram shows a reflex arc in a human nervous system. The person's finger has just made contact with a sharp object. Which part is the motor neurone?
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Which lines on the graphs show the effects of adrenaline on pupil diameter and heart rate?
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Which statements about tropisms in plants are correct?
1. Shoots grow towards light and away from gravity.
2. Shoots grow away from light and towards gravity.
3. Roots grow towards light and away from gravity.
4. Roots grow away from light and towards gravity.
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What is defined as a substance that is taken into the body and modifies or affects chemical reactions in the body?
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Which row is correct for asexual reproduction? [Table_1]
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The diagram shows some stages in reproduction.
Which letter correctly identifies the structure or process?
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The diagram shows half a flower. Which structure produces pollen?
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Two parents have the genotypes Bb and bb for a particular feature. What is the probability of these parents having offspring that are homozygous recessive for this feature?
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A genetic cross between two organisms may be shown as Tt \times Tt. What does T represent?
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Some phenotypes are listed.
1. blood group
2. body mass
3. height
4. seed colour in peas
Which phenotypes are examples of continuous variation?
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A food chain is shown. \( \text{lettuce plant} \rightarrow \text{slug} \rightarrow \text{hedgehog} \) By which process is energy transferred from the lettuce plant to the slug?
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A single bush is food for a large population of greenfly. Several ladybirds eat the greenfly. The ladybirds are eaten by a bird. Which diagram shows the pyramid of numbers for this food chain?
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Scientists studied the uptake of potassium ions from chemical fertilisers by wheat plants. The results are shown. What is the difference in the uptake of potassium ions at 360 days after planting compared to 30 days after planting?
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A student investigated gas exchange using the apparatus shown. What would be the appearance of the limewater in tube X and tube Y after breathing in and out of the mouthpiece for one minute?
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The diagram shows the flow of energy in an ecosystem. Which row correctly completes boxes 1, 2 and 3?
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