CAPE Agricultural Science Unit 2 · 2015 · Paper 2

26 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)1 markDefine the term 'greenhouse gas'.
2. 1(a)(ii)4 marksOutline how carbon dioxide and methane enter the atmosphere.
3. 1(b)(i)2 marksDescribe the trend in CO2 concentration in relation to anthropogenic emissions shown in Figure 1.
4. 1(b)(ii)3 marksAccount for the trend observed in Figure 1.
5. 1(c)(i)1 markState the date that the Kyoto Protocol was adopted.
6. 1(c)(ii)1 markState the date on which the amendment to the Kyoto Protocol was circulated by the Secretary-General of the United Nations.
7. 1(c)(iii)1 markState why the Kyoto Protocol was adopted.
8. 1(c)(iv)2 marksExplain how the responsibilities for greenhouse gas emissions are weighted by the Kyoto Protocol.
9. 2(a)(i)2 marksExplain what is meant by the term 'feed conversion ratio' (FCR).
10. 2(a)(ii)3 marksA farmer introduces a feed additive during the final two weeks of broiler production and observes an improved FCR at slaughter. Suggest THREE ways the feed additive could have improved FCR.
11. 2(a)(iii)3 marksCalculate the FCR for this batch of broilers, showing all working.
12. 2(b)(i)3 marksExplain how internal parasites can affect FCR, giving an example of an internal parasite.
13. 2(b)(ii)4 marksList FOUR clinical signs of internal parasites in farm animals.
14. 3(a)(i)1 markState what is meant by 'cloning'.
15. 3(a)(ii)5 marksProvide the missing annotations for labels A, B, C, D, and E to complete Figure 2.
16. 3(b)(i)3 marksOutline THREE ethical concerns regarding the cloning of animals.
17. 3(b)(ii)2 marksState TWO benefits derived from using therapeutic cloning in animal production.
18. 3(c)4 marksSuggest FOUR promotional strategies that can be employed to promote therapeutic cloned chicken.
19. 4(a)5 marksExplain what is meant by 'air quality' and explain how air quality affects photosynthesis and subsequent crop production.
20. 4(b)10 marksExplain how reforestation can improve environmental conditions for food crop production.
21. 5(a)2 marksIdentify FOUR contagious diseases that affect broilers.
22. 5(b)3 marksDescribe THREE ways in which an intensively reared broiler flock can become infected by contagious diseases.
23. 5(c)10 marksAn entrepreneur plans to commercially produce chickens and ducks. Recommend TWO biosecurity measures to implement prior to establishing the farm and THREE biosecurity measures to implement after establishment, providing…
24. 6(a)4 marksDefine the term 'grading' and explain how grading adds value to fish.
25. 6(b)3 marksIdentify ONE suitable basis for grading fish prior to harvesting and explain its importance to the profitability of the fish farm.
26. 6(c)8 marksDescribe FOUR postharvest handling strategies, other than grading, that the operator can use to add value to fish.