IGCSE Biology (0970) — May–June 2025, Paper 12
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →When a herbivore sees a carnivore, which characteristic of living things is involved? A excretion B growth C reproduction D sensitivity
Answer this question and get it marked →Which organism has been named using the binomial system? A Brown seaweed B Polar bear C Red fox D Vulpes vulpes
Answer this question and get it marked →Which list contains only arthropods? A amphibians, insects, myriapods B arachnids, crustaceans, myriapods C crustaceans, insects, fish D insects, myriapods, reptiles
Answer this question and get it marked →The diagram shows a plant cell with four labelled structures A, B, C and D. Label A points to the cytoplasm/cell wall region (upper left), B points to a structure on the right…
Answer this question and get it marked →The table shows the magnifications and image lengths of three specimens when seen with a light microscope. specimen magnification image length / mm --- --- --- X ×50 0.20 Y ×150…
Answer this question and get it marked →The diagram represents two liquids separated by a partially permeable membrane. On the left there are many small molecules of water and no large dissolved molecules; on the right…
Answer this question and get it marked →Small molecules are used to synthesise large food molecules. Which statement is correct? A Amino acids are the basic units of carbohydrates. B Fatty acids are the basic units of…
Answer this question and get it marked →A student used biuret reagent to test milk for the presence of protein. The milk tested positive for protein. Which colour did the sample change to? A blue B blue-black C brick…
Answer this question and get it marked →Which substances are used for photosynthesis? A carbon dioxide and glucose B carbon dioxide and water C glucose and oxygen D glucose and water
Answer this question and get it marked →What happens when a plant lacks magnesium ions? chlorophyll production colour of leaves produced --- --- --- A decreases green B decreases yellow C increases green D increases…
Answer this question and get it marked →The diagram shows part of a cross-section of a leaf, with three regions bracketed and numbered 1, 2 and 3 from top to bottom. Region 1 is a single layer of cells at the top…
Answer this question and get it marked →A diet contains a lot of plant material, but no meat. Which dietary component is unlikely to be deficient in this diet? A fat B fibre C protein D vitamin D
Answer this question and get it marked →Which two parts of the mouth are teeth embedded in? A cement and pulp B enamel and dentine C gums and bone D pulp and bone
Answer this question and get it marked →The diagram shows part of the human digestive system, with four labelled regions. Label D points to the stomach (upper right), label A points to a region near the junction of the…
Answer this question and get it marked →What is absorbed in the colon and the small intestine? colon small intestine --- --- --- A digested food only digested food and water B digested food only water only C water…
Answer this question and get it marked →The diagram shows the movement of water molecules from a plant leaf to its environment. Part of a leaf cross-section is shown with mesophyll cells and a stoma in the lower…
Answer this question and get it marked →The diagram shows a simplified circulatory system in humans as four boxes labelled organ A, organ B, organ C and organ D connected by arrows showing the direction of blood flow.…
Answer this question and get it marked →Which blood vessel transports blood from the lungs to the heart? A aorta B pulmonary artery C pulmonary vein D vena cava
Answer this question and get it marked →How can the spread of disease be prevented? A leaving food uncovered B only washing hands after meals C using the same equipment to prepare raw and cooked food D washing hands…
Answer this question and get it marked →Which substance can be used to test for carbon dioxide? A DCPIP B ethanol C iodine solution D limewater
Answer this question and get it marked →Which statement is a correct comparison of aerobic respiration and anaerobic respiration in yeast? A Only aerobic respiration produces carbon dioxide. B Only anaerobic respiration…
Answer this question and get it marked →The diagram shows some of the organs involved in excretion. Two kidneys are shown with tubes leading down to a bladder, which empties through a tube at the bottom. Label A points…
Answer this question and get it marked →A person touches a hot object which stimulates structure P in the skin. This causes an electrical impulse to be sent through structure Q to the central nervous system. Which row…
Answer this question and get it marked →The diagram shows the position of two glands in the body. Gland 1 is shown sitting on top of the left kidney, the right kidney is labelled, the duodenum is labelled, and gland 2…
Answer this question and get it marked →A seedling was placed in a horizontal position. Which diagram shows the expected gravitropic responses in the seedling? Diagram A: both root and shoot remain horizontal. Diagram…
Answer this question and get it marked →The diagram shows a sperm cell with a long tail on the left, a midpiece, and a rounded head on the right. Four parts are labelled: A points to the tail, B points to the…
Answer this question and get it marked →Which secondary sexual characteristic is associated with testosterone? A breast development B facial hair growth C start of the menstrual cycle D widening of hips
Answer this question and get it marked →The diagram shows a human menstrual cycle drawn as a circle marked day 0 (top), day 7 (right), day 14 (bottom) and day 21 (left). Arrow X points to the region just after day 0…
Answer this question and get it marked →What is an alternative form of a gene called? A allele B chromosome C genotype D protein
Answer this question and get it marked →Cystic fibrosis is an inherited condition that occurs when an individual is homozygous for the recessive allele. If both parents are heterozygous for this characteristic, what is…
Answer this question and get it marked →Which characteristic is an example of continuous variation? A ABO blood groups in humans B body mass in cats C seed colour in pea plants D seed shape in pea plants
Answer this question and get it marked →The photograph shows the butterfly Caligo martia. The butterfly has large patterned wings; the lower (hind) wings each bear a large round dark spot resembling an eye. Which…
Answer this question and get it marked →What is the principal source of energy input to biological systems? A kinetic B photosynthesis C respiration D the Sun
Answer this question and get it marked →The diagram shows the flow of energy in a food chain as four boxes labelled organism A, organism B, organism C and organism D connected by arrows. Energy flows from organism C up…
Answer this question and get it marked →The diagram shows part of the carbon cycle. Boxes show 'carbon dioxide in atmosphere', 'plants', 'animals', and 'waste products and dead organisms'. Numbered arrows: arrow 1 goes…
Answer this question and get it marked →The diagram shows a population curve (a sigmoid growth curve) plotting number of individuals in a population against time. Four points are labelled along the curve: A near the…
Answer this question and get it marked →The graph shows the percentage of species lost, in three different animal groups (mammals; reptiles and amphibians; birds), due to different human activities during the last ten…
Answer this question and get it marked →Why are bacteria useful in biotechnology and genetic modification? 1 They can make complex molecules. 2 They have a rapid reproduction rate. 3 They have cell walls. A 1, 2 and 3 B…
Answer this question and get it marked →The graph shows how changing the temperature affects the rate of stain removal from clothes, using a biological washing powder. The curve of rate of stain removal against…
Answer this question and get it marked →The flow chart shows some of the processes involved in making biofuel: grind up plant biomass to extract K → filter to remove waste → add organism L for anaerobic respiration of K…
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