QCL Science - Home



Six-mark questions from Biology IGCSE papers (2012-2017). You will need to view the mark schemes to check your answers.IB Jan 20129 Explain how the structure of the leaf is adapted for its role as the organ of photosynthesis. 12 Farmers use bird scarers that make a sudden loud noise to frighten birds away from their crops. Design an investigation to find out if noise affects the amount of crops birds eat. 14 Explain the methods used to produce large numbers of fish in a fish farm. IB May 201213 Describe an investigation to find out if keeping chickens indoors increases their growth. IB Jan 20139 Fish can be produced in large numbers on fish farms.Design an investigation to find out if the growth of fish is affected by the temperature of the water in which they are farmed. IBR June 201315 Describe an investigation to find out the most suitable amount of calcium ions needed to get the best growth in rats. IB June 2013 14 Commercial flower growers keep their plants in greenhouses under artificial light. Describe an investigation to find out if the length of time that plants are exposed to light affects how long it takes for flowers to appear. IB Jan 20149 Describe an investigation to find out if leaves growing at the bottom of trees are greener than leaves growing at the top of trees. Your answer should include experimental details and be written in full sentences and paragraphs. 10d Oryx and humans can control water loss by making their urine very concentrated. Describe how this is done. IB June 201413 To produce large amounts of human insulin the genetically modified bacteria are grown in a fermenter. Describe an investigation to find out if temperature affects the amount of insulin made by genetically modified bacteria. Your answer should include experimental details and be written in full sentences and paragraphs. 1BR June 201412 Cholesterol is a fatty substance found in the blood that can increase the risk of heart disease. Statins are drugs thought to lower blood cholesterol levels.Design an investigation to find out the effect of statins on blood cholesterol levels. Your answer should include experimental details and be written in full sentences and paragraphs. IB Jan 20156e Pheromone traps could also be used to control the leaf miner. Pheromones are smells that attract leaf miner males. Design an investigation to find out if a pheromone trap would help to control the leaf miner. Your answer should include experimental details and be written in full sentences. IB June 2015 12 Eating garlic is thought to reduce the chance of being bitten by insects, such as mosquitoes. Design an investigation to find out if people who have eaten garlic are less likely to attract mosquitoes than people who have not eaten garlic.Your answer should include experimental details and be written in full sentences. 1 BR June 201513 Describe an investigation to find out if adding vitamin D to the diet of young children will help to prevent rickets (a deformation of the legs). Your answer should include experimental details and be written in full sentences. 1B Jan 20165 Plants can be genetically modified (GM) to make them resistant to pests.Describe an investigation that could be carried out to find out if GM plants produce a better yield than normal plants.Your answer should include experimental details and be written in full sentences. IB June 20165 During the cloning of mammals unfertilised eggs are collected from the female.These unfertilised eggs are stored in a special nutrient solution before they are fertilised. Design an investigation to find the best storage temperature for the survival of the unfertilised eggs. Your answer should include experimental details and be written in full sentences. 1 BR June 201610c(ii) If waste from fish farms is released into rivers it will cause pollution. Design an investigation to compare the pollution caused by waste released from the new type of fish farm with waste released from a traditional fish farm. Your answer should include experimental details and be written in full sentences. IB Jan 2017 5b In the UK, salt is spread over road surfaces in winter to prevent ice from forming. When it rains this salt is washed on to the soil by the side of the road. Design an investigation to find out if plant growth is affected by the increased salt concentration in the soil. Your answer should include experimental details and be written in full sentences. 8b(ii) Describetheconsequencesofanincreaseincarbondioxidefortheworld’secosystems. IB June 20175d Some people in the survey did not know anything about cloning.The process had to be described to them before they made a decision. Describe the process of cloning an adult animal using a named example. 11b The garden bench is painted with a fungicide solution. This prevents the wood being decomposed because fungicide kills fungi. There are different fungicides that can be used. Design an investigation to find out which fungicide is best at preventing the decomposition of wooden logs. Your answer should include experimental details and be written in full sentences. 1BR June 201712 Biological washing powder contains enzymes to remove stains from clothes. Describe an investigation to find the temperature at which biological washing powder is most effective at removing stains.Your answer should include experimental details and be written in full sentences. ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download