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Living animals release carbon dioxide. This is an example of which life process?
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Some statements about species are given.
1. Members of a species all look identical.
2. Members of a species belong to the same genus.
3. Members of a species can produce fertile offspring.
4. Species are named using an international system.
Which statements are correct?
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The table shows some features of different animals. Which animal is a reptile? [Table_1]
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Which structures are found in the cells of all living organisms?\n \n 1. cell membrane\n 2. chloroplast\n 3. cytoplasm
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A diagram of a human red blood cell is shown. The length of line XY on the diagram is 40 mm. The actual width of the cell is 0.008 mm. What is the magnification of the diagram?
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Which statements are correct for both diffusion and osmosis?
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What is a role of water in digestion?
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The concentration of sodium ions in the soil is lower than the concentration inside root hair cells. Which process will be used when sodium ions are taken into root hair cells from the soil?
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The diagram represents a protein molecule.
What do the small circles represent?
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Which processes depend on the action of enzymes?\n1. digestion\n2. osmosis\n3. respiration
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Which diagram of an enzyme, active site and substrate is correct?
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Four test-tubes are set up as shown. Which test-tube contains the least carbon dioxide after one hour?
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Which row shows the uses of some carbohydrates in plants? [Table_1]
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The lack of which component of a balanced diet will lead to the development of scurvy?
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Which structure is the duodenum?
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The food label is from a packet of cereal. The label can help someone who is concerned about their diet. A person eats 45 g of cereal. One of the food types listed in the label can help prevent constipation. How many grams of this food type does the person eat?
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Which pathway is taken by water through a plant?
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Which row shows the transpiration rate for the conditions described? [Table_1]
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The diagram shows the human heart. Which label shows the left ventricle?
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Which row shows the features of an artery or a vein?
[Table_1]
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What are features of gas exchange surfaces in animals?
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Which chemical can be used to show the presence of carbon dioxide gas?
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The diagram represents the exchange of gases during breathing and during respiration in the body.
What is represented by X?
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Which molecule is produced by anaerobic respiration in yeast?
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The diagram shows the human body and some of its organs. Which structure removes urea from the blood?
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The diagram shows the structures in a reflex arc. What is X?
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Changes in light intensity cause changes in the diameter of the pupil in the eye. Which rows show the pupil reflex? [Table_1]
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A hormone is injected into a person to reduce their blood glucose concentration. Which endocrine gland is not functioning properly in a person who needs to have this injection?
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The table shows which antibiotics are effective against different types of bacteria. The shaded areas show the antibiotic is effective against that type of bacteria. [Table_1] A person has a disease caused by a type of \textit{Streptococcus} bacteria and a second infection caused by a type of \textit{Pseudomonas} bacteria. Which antibiotic should be taken?
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The diagram shows one way that a plant can reproduce.
What is a feature of this type of reproduction?
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Which human characteristics are inherited? [Table_1]
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In a sperm cell, which structure contains enzymes that can digest the jelly coat of an egg cell?
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When breeding, which pair of parents will be pure-breeding for a particular characteristic?
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In a pea plant, the allele for round seeds, \( R \), is dominant to the allele for wrinkled seeds, \( r \). If plants with the genotype \( Rr \) are crossed, what are the likely proportions of offspring?
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Which definition of continuous variation is correct?
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Which term is used to describe an organism that makes its own organic nutrients?
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What is the principal source of energy for most food chains?
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A single tree is food for a large population of caterpillars. Several small birds eat the caterpillars. The small birds are eaten by a bird of prey.
Which is the pyramid of biomass?
[Image with options A, B, C, D]
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The diagram shows the results of a survey on the types of animals found along a stretch of river near to a factory. Which animal lives in the least polluted water?
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Bacteria are useful for manufacturing products for human use.
Which statement explains why they are useful?
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