describe how glasshouses and polythene tunnels can be used to 244-246 increase the yield of certain crops understand how varying carbon dioxide concentration, light intensity 47 and temperature affect the rate of photosynthesis understand the effects on crop yield of increased carbon dioxide and 246 increased temperature in glasshouses understand the reasons for pest control and the advantages and 248 disadvantages of using pesticides and biological control with crop plants understand that plants require mineral ions for growth and that 52-53 magnesium ions are needed for chlorophyll and nitrate ions are needed for amino acids understand the use of fertiliser to increase crop yield 247 describe the stages in the nitrogen cycle, including the roles of 226-227 nitrogen fixing bacteria, decomposers, nitrifying bacteria and denitrifying bacteria (specific names of bacteria are not required) understand that eutrophication can result from leached minerals from 235-236 fertiliser understand the biological consequences of pollution of water by 235 sewage, including increases in the number of micro-organisms causing depletion of oxygen Textbook Read textbook Tried exam Problems questions in Excretion & Gas exchange (plants) textbook explain how the structure of the leaf is adapted for gas 76-78 exchange understand the role of diffusion in gas exchange 31
describe how glasshouses and polythene tunnels can be used to increase the yield of certain crops 244-246 understand how varying carbon dioxide concentration, light intensity and temperature affect the rate of photosynthesis 47 understand the effects on crop yield of increased carbon dioxide and increased temperature in glasshouses 246 understand the reasons for pest control and the advantages and disadvantages of using pesticides and biological control with crop plants 248 understand that plants require mineral ions for growth and that magnesium ions are needed for chlorophyll and nitrate ions are needed for amino acids 52-53 understand the use of fertiliser to increase crop yield 247 describe the stages in the nitrogen cycle, including the roles of nitrogen fixing bacteria, decomposers, nitrifying bacteria and denitrifying bacteria (specific names of bacteria are not required) 226-227 understand that eutrophication can result from leached minerals from fertiliser 235-236 understand the biological consequences of pollution of water by sewage, including increases in the number of micro-organisms causing depletion of oxygen 235 Excretion & Gas exchange (plants) Textbook Read textbook Tried exam questions in textbook Problems explain how the structure of the leaf is adapted for gas exchange 76-78 understand the role of diffusion in gas exchange 31
biology_igcse_detailed_checklist_triple_final.docx