CSEC Human and Social Biology · January 2013 · Paper 2

37 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)a)1 markState ONE hormone produced by the testis.
2. 1(a)(i)b)1 markState ONE hormone produced by the ovary.
3. 1(a)(ii)1 markState ONE function of the hormone named in (i) a).
4. 1(b)(i)2 marksOutline the function of the parts labelled 'placenta' and 'amnion'.
5. 1(b)(ii)1 markLabel the umbilical cord on Figure 1.
6. 1(c)(i)a)3 marksOn the grid provided in Figure 2 on page 5, construct a bar graph of the data in Table 1.
7. 1(c)(i)b)1 markUse the graph drawn in Figure 2 to describe the trend that occurs in mothers who are 30–59 years of age.
8. 1(c)(ii)2 marksExplain how smoking tobacco may lead to mothers delivering still-born babies.
9. 1(c)(iii)3 marksSuggest THREE diseases that smoking tobacco may cause in adults.
10. 2(a)2 marksName the type of tooth labelled W and state its function.
11. 2(b)(i)2 marksFrom the foods mentioned in the scenario, name ONE source and ONE function of Vitamin A.
12. 2(b)(ii)2 marksGive the definition of 'Body Mass Index'.
13. 2(b)(iii)a)2 marksAndy is 1.0 m tall and weighs 45 kg. Calculate his BMI using the formula BMI = Weight (kg) / [Height (m)]^2.
14. 2(b)(iii)b)1 markBased on your calculation in (iii) a), state whether Andy is overweight.
15. 2(b)(iv)4 marksRecommend how the portions of starches, proteins, and vegetables can be adjusted to reverse the observed trend (overweight children with night blindness), giving a reason for EACH adjustment.
16. 2(b)(v)2 marksSuggest TWO factors, other than poor diet, that could contribute to children having a BMI above the normal range.
17. 3(a)(i)2 marksName the bones labelled X and Y in Figure 4.
18. 3(a)(ii)2 marksState ONE function of EACH bone named in (i).
19. 3(b)2 marksState TWO distinguishing features of bone and cartilage.
20. 3(c)5 marksExplain how poor posture and wearing high-heeled shoes could contribute to Charles' back pains and Summer's painful arches, respectively.
21. 3(d)(i)2 marksSuggest ONE vitamin and ONE mineral that may be deficient in Granny Luanda's diet.
22. 3(d)(ii)2 marksSuggest ONE disease EACH that could develop as a result of a deficiency of the vitamin and mineral named in (d)(i).
23. 4(a)4 marksName TWO sense organs and the stimuli they detect.
24. 4(b)(i)3 marksAnnotate Figure 6 to show the activities that occur when the eye is focusing on a near object.
25. 4(b)(ii)1 markState the name of the process by which the eye focuses on near and far objects.
26. 4(c)(i)1 markName the eye defect that is caused by an irregularly curved cornea.
27. 4(c)(ii)2 marksExplain what causes glaucoma.
28. 4(c)(iii)1 markWhat effect does glaucoma have on eye vision?
29. 4(c)(iv)3 marksExplain to Uncle Khan what a cataract is and how it can be treated.
30. 5(a)3 marksDefine the terms 'gene' and 'dominance'.
31. 5(b)(i)3 marksExplain what is meant by the term 'carrier'.
32. 5(b)(ii)5 marksComplete the Punnett square for a cross between Mrs Trinbage (X^H X^h) and her husband, who is normal (X^H Y^H).
33. 5(b)(iii)4 marksDescribe the possible phenotypes of their offspring.
34. 6(a)4 marksDefine the term 'pollutant' and identify TWO sources of chemical pollutants.
35. 6(b)2 marksDistinguish between the terms 'disinfectant' and 'antiseptic'.
36. 6(c)5 marksExplain what the residents were trying to achieve by treating the water with bleach and why this treatment was NOT enough to ensure that the water was safe for human consumption.
37. 6(d)4 marksDiscuss how landfills in the Caribbean are NOT as effective today for disposing of refuse as they were many years ago.