Sciences Co-ordinated 9-1 0973: B16 - Organisms and their environment Topical Past Paper Questions

Figure 3.1 shows a food web from an aquatic ecosystem. Figure 3.1 (a) Place ticks (✓) in all the boxes that describe the perch in Figure 3.1. [Unlabeled] (b) The longest food chains in this food web have five trophic levels. (i) Write down a food chain from Figure 3.1 with five t…

Fig. 3.1 is a diagram showing some of the organisms in the Arctic ecosystem. Fig. 3.1 a) (i) State the name of the type of diagram shown in Fig. 3.1. [1] (ii) Identify the producer in Fig. 3.1. [1] (iii) Identify one organism that occupies the second trophic level in Fig. 3.1. [1…

Scientists investigate eutrophication in a lake. They measure the relative abundance of different factors. Fig. 10.1 is a graph summarising the results. Fig. 10.1 (a) The growth of surface producers in the lake increases during eutrophication. Explain why, using the information i…