Iculations. 1.2 If only the above food chain exists in an ecosystem, explain the effect of the death of the greenfly that ecosystem. 2 An investigation was carried out using 50g of each of three soil types: sand, loam and clay place n filter paper in a funnel. 80 ml of water was run through each soil. A measuring cylinder was plac elow each set of apparatus to collect the water. An incomplete set of results for the investigation is given in the table below: Amount of water grained through each soil (ml) Amount of water retained by each soil (ml) 2.2.1 Soil A 40 2.2.2 Soil B How much of water was retained by soil C? Which soil type (A, B or C) was sand? Give a reason for your answer. 2.2.3 Identify TWO factors that should be kept constant in this investigation. 15 Soil 25​