When scientists obtain the biomass of samples, they heat it at 75 °C for 2 hours. They weigh the sample, reheat it for 15 minutes and weigh it again. They continue this cycle of reheating and weighing until they find the sample has a constant mass. Explain how this method helps to provide a reliable measurement of the biomass. (2 marks)

correct answer: understand the different control methods available

integrated pest management is an strategy that is based on the ecosystem and try to prevent the pest and the damage caused by them by applying combination of technique like habitat manipulation, biological control and use of resistant varieties.

the main aim of the integrated pest management is not to completely eliminate the pest but to strengthen the ecosystem so that conditions are favorable for plants and unfavorable for pests.