CAPE Biology Unit 2 · May/June 2022 · Paper 2

24 questions and parts from this paper. Open one to see it in full, then practise it on Quelpr and get it marked against the mark scheme.

1. 1(a)(i)2 marksDefine the term 'limiting factor'.
2. 1(a)(ii)2 marksOutline how light intensity is a limiting factor in the process of photosynthesis.
3. 1(b)(i)2 marksState a suitable hypothesis for the investigation.
4. 1(b)(ii)2 marksIdentify ONE manipulated variable and ONE responding variable in the investigation.
5. 1(b)(iii)1 markState ONE variable that should be controlled in the investigation.
6. 1(b)(iv)3 marksExplain how growing lettuce in a greenhouse using a hydroponic system can reduce the effects of ONE limiting factor of photosynthesis.
7. 1(c)(i)2 marksDefine the term 'species diversity'.
8. 1(c)(ii)3 marksExplain how high species diversity affects the stability of an ecosystem.
9. 1(d)(i)4 marksClassify EACH of the following factors as EITHER an abiotic factor or a biotic factor. Ocean currents, The lionfish as predators, The lionfish feeding on cleaner fish, Warm Caribbean Sea.
10. 1(d)(ii)9 marksExplain how any THREE of the factors in (d)(i) influenced the dynamics of the coral reef ecosystem since the invasion of the lionfish.
11. 2(a)(i)3 marksOn Figure 1, insert labels to identify THREE different types of root cells.
12. 2(a)(ii)3 marksInsert arrows on Figure 1 to illustrate the direction of water movement from the soil into the different areas of the plant root shown in the diagram.
13. 2(a)(iii)2 marksDescribe how water potential facilitates the movement of water from the soil into the plant roots.
14. 2(b)(i)4 marksCompare the observed differences in transpiration rates at 60 days and 75 days at the highest intensities and lowest intensities.
15. 2(b)(ii)3 marksExplain the differences between the transpiration rates on a sunny day and at night-time.
16. 2(c)7 marksIn the space provided below, draw a diagram of ONE red blood cell and ONE white blood cell shown in Figure 3.
17. 2(d)8 marksJustify why cardiac output increases during peak performance in athletes (80–120 bpm) but decreases when heart rate exceeds 160 bpm.
18. 3(a)(i)5 marksOn the grid provided on page 17, plot a bar chart based on the data provided in Table 1.
19. 3(a)(ii)1 markState ONE conclusion that can be made based on the data provided in Table 1.
20. 3(b)(i)4 marksDefine the following terms. Active immunity, Passive immunity.
21. 3(b)(ii)4 marksName ONE example of EACH of the following types of immunity. Natural active, Natural passive, Artificial active, Artificial passive.
22. 3(b)(iii)2 marksDescribe the role of vaccination in providing immunity.
23. 3(b)(iv)5 marksConstruct an annotated flow chart to explain how the vaccination of children with the MMR vaccine can provide immunity.
24. 3(c)(i)9 marksRelate THREE features of T-cells to their role in the various stages of CAR T-cell immunotherapy.