Biology 9-1 0970: Variation and Selection Topical Past Paper Questions

(a) Discuss the advantages of intensive livestock production. [3] (b) One disadvantage of intensive livestock production is that antibiotics are often used. Suggest why antibiotics are needed in intensive livestock production. (c) Fig. 5.1 shows the changes in antibiotic use in l…

Fig. 5.1 is a pedigree diagram showing the inheritance of blood group in one family. Fig. 5.1 (a) State the number of people in Fig. 5.1 with: XY chromosomes ..... only one I $ ^{A} $ allele. (b) Explain how Fig. 5.1 shows that blood group is an example of discontinuous variation…

(a) A farmer wanted to use selective breeding to produce goats with a high milk yield. Fig. 7.1 shows a goat being milked. Fig. 7.1 Describe the stages in selective breeding to develop goats with a high milk yield. [3] (b) Animals can be farmed intensively. State two advantages o…