CSEC Human and Social Biology · 2021 · Paper 2

36 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)4 marksNumber each step in the provided table to show the correct order in the birth process.
2. 1(b)2 marksState TWO reliable methods of birth control.
3. 1(c)(i)5 marksPlot a bar graph on the grid provided to compare the live birth rates of women who attended antenatal clinics and women who did not attend antenatal clinics for EACH country in Table 2.
4. 1(c)(ii)1 markState which country had the HIGHEST number of live births as a result of their women attending antenatal clinics.
5. 1(c)(iii)1 markSuggest ONE reason why some countries had low live birth rates even though their women attended antenatal clinics.
6. 1(c)(iv)2 marksSuggest ONE reason for good health in the breastfeeding mothers and ONE reason for good health in the breastfed babies.
7. 2(a)(i)1 markState what the arrows labelled A represent in Figure 1.
8. 2(a)(ii)1 markState what process is occurring at the arrow labelled B in Figure 1.
9. 2(a)(iii)2 marksIdentify which organism is the primary consumer and which organism is the producer in the food chain shown.
10. 2(b)(i)5 marksConstruct a food chain representing the information in the scenario.
11. 2(b)(ii)2 marksName TWO types of organisms that would be responsible for decomposing the dead garden snake.
12. 2(b)(iii)3 marksExplain how burying the dead snake near the roots of the Croton plant would be beneficial to the plant.
13. 2(b)(iv)1 markState whether or not Stacy would have the same number of snakes in her yard as frogs.
14. 3(a)2 marksIdentify EACH structure labelled A and B in Figure 2.
15. 3(b)2 marksComplete the paragraph describing homeostatic regulation by selecting the TWO correct phrases from the provided box.
16. 3(c)2 marksState TWO responses that occur in the body when carbon dioxide levels in the blood increase.
17. 3(d)(i)2 marksExplain why the friends experienced frequent urination.
18. 3(d)(ii)2 marksExplain why the friends experienced extreme thirst.
19. 3(e)(i)1 markState the effect that drinking alcoholic beverages would have on Pedro's blood glucose levels.
20. 3(e)(ii)2 marksExplain how Pedro's body would normally respond to eliminate the effect stated in (e)(i).
21. 3(e)(iii)2 marksSuggest the disease from which Pedro is MOST likely suffering and state why he would have experienced dizzy spells and lethargy.
22. 4(a)4 marksComplete Table 3 by numbering EACH step in the purification process in the correct order.
23. 4(b)2 marksState TWO ways in which human activity could negatively impact water supplies.
24. 4(c)(i)2 marksState TWO contaminants that Leah and her community could be exposed to after the flood.
25. 4(c)(ii)3 marksSuggest THREE diseases that Leah and her community are likely to contract as a result of the flooding.
26. 4(c)(iii)4 marksRecommend FOUR precautions that residents could take during the flooding crisis to prevent the spread of diseases.
27. 5(a)(i)2 marksIdentify TWO bones located in the chest region of the skeleton.
28. 5(a)(ii)2 marksState TWO functions of the skeleton, other than movement.
29. 5(a)(iii)2 marksCompare the movement of a hinge joint with the movement of a ball and socket joint.
30. 5(b)5 marksExplain why Tina's belief was not entirely accurate.
31. 5(c)4 marksSuggest the condition from which he MOST likely suffers and explain how he may have developed this condition.
32. 6(a)(i)2 marksState ONE example of continuous variation and ONE example of discontinuous variation.
33. 6(a)(ii)2 marksState TWO reasons why genetic variation is important to organisms.
34. 6(b)(i)2 marksName the disease that the Aedes aegypti mosquito carries and identify ONE other mosquito-borne disease.
35. 6(b)(ii)3 marksExplain why scientists predict that long dry seasons could increase levels of mosquito-borne diseases.
36. 6(c)6 marksAside from awful body odour, explain THREE health challenges Brendon may experience as a result of these poor personal hygiene practices.