Biology 9700 · AS & A Level · Natural and artificial selection
Natural and artificial selection — practice question
Atlantic salmon, $Salmo\ salar$, is a major fish species reared for human food. Fig. 3.1 illustrates an Atlantic salmon. Infectious pancreatic necrosis (IPN) is a severe viral disease that is currently affecting farmed salmon.
(a(i))[3]
Describe how artificial selection could be used to produce a population of salmon that is resistant to IPN.
(a(ii))[2]
Suggest problems that might arise from artificial selection.
(b)
(b(i))[4]
Describe and explain how percentage mortality differs between groups A and B.
(b(ii))[1]
Suggest one reason for the mortality seen in group C.
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Deliberately expose salmon to IPN virus” …