CSEC Biology · May/June 2006 · Paper 2

33 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)6 marksComplete Table 1 using ONLY the organisms shown in the food webs in Figure 1.
2. 1(b)2 marksIdentify TWO similarities between the aquatic and terrestrial food webs.
3. 1(c)7 marksDescribe how data may be collected to construct the terrestrial food web in Figure 1. Make a list of the materials and apparatus required and state ONE precaution to be taken in collecting the data.
4. 1(d)4 marksIn the space provided below, construct a table to present the data to be collected for constructing the terrestrial food web.
5. 1(e)2 marksSuggest TWO ways in which the data to be collected may be summarized or represented, apart from food webs.
6. 1(f)(i)2 marksHow would the method differ from that described in (c), if you wished to gather data to construct the aquatic food web?
7. 1(f)(ii)2 marksExplain why the method would be different for collecting data for the aquatic food web.
8. 1(g)(i)2 marksName TWO types of decomposers that are usually found in food webs.
9. 1(g)(ii)3 marksDescribe the role decomposers play in the recycling process.
10. 2(a)(i)3 marksComplete the labelling of the boxes in Figure 2.
11. 2(a)(ii)4 marksPlace the symbols (P, R, S and T) in the boxes in Figure 2 where the respective activities described below take place: P: Completion of digestive processes R: Production of an acidic pH S: Absorption of large quantities…
12. 2(a)(iii)1 markDraw ONE arrow on the diagram in Figure 2 to show where digested food is taken.
13. 2(b)6 marksIdentify THREE products into which food is converted during the digestive process and give a function of EACH of the products identified.
14. 3(a)(i)3 marksIdentify the structures labelled A, B and C in Figure 3.
15. 3(a)(ii)1 markState the function of the structure labelled C in Figure 3.
16. 3(a)(iii)2 marksState TWO structural differences between xylem and phloem.
17. 3(b)(i)2 marksSometimes roots develop as storage organs. Suggest TWO reasons why a plant may need to store food.
18. 3(b)(ii)a)1 markPlace an X on Figure 4, in the area where food material is likely to be stored.
19. 3(b)(ii)b)3 marksLabel any THREE structures in Figure 4.
20. 3(c)(i)2 marksState TWO environmental factors that are necessary for photosynthesis to occur.
21. 3(c)(ii)2 marksHow does food manufactured in photosynthesis reach storage areas in the root?
22. 4(a)(i)8 marksComplete Table 2 below by writing the name and function of EACH of the structures labelled I, II, IV and VI.
23. 4(a)(ii)2 marksExplain why III and V, shown in Figure 5, may be described as having similar functions.
24. 4(b)(i)1 markName the product of fertilization.
25. 4(b)(ii)a)2 marksWhat becomes of the product of fertilization in humans?
26. 4(b)(ii)b)2 marksWhat becomes of the product of fertilization in flowering plants?
27. 4(c)2 marksIdentify TWO ways in which the male and female reproductive organs illustrated in Figure 5 function differently from each other.
28. 5(a)(i)3 marksParents (P₁) represent pure-breeding dogs for coat colour. In the space provided below, use appropriate symbols to represent the coat colour for both parents and the F₁ generation.
29. 5(a)(ii)4 marksUsing appropriate stripes, complete the diagrams of the F₂ generation in Figure 6, to show the coat colours of the offspring when the F₁ generation interbreed.
30. 5(b)(i)2 marksExplain the meaning of the term 'phenotype'.
31. 5(b)(ii)2 marksHow is the phenotype of an organism determined?
32. 5(c)(i)2 marksWhy is genetic variation important?
33. 5(c)(ii)2 marksExplain why this practice may be considered risky.