CXC questions (sample)

6. (a) State what is meant by ‘natural selection’ and explain why genetic variation is
important in natural selection.                                                      (4 marks)

(b) Humans have developed breeds of dogs with different traits. Explain TWO ways
in which this breeding process differs from natural selection, giving TWO
possible disadvantages to the species.                                          (4 marks)

(c) Genetic engineering techniques are being applied in areas such as medicine,
biotechnology and research. Discuss TWO possible negative outcomes of genetic
engineering, and THREE benefits of continuing the use of genetic engineering
techniques. In your answer, state what is meant by genetic engineering.
                                                                                                        (7 marks)
(Provide answers in comment section for further discussion)