COMMAND WORD · BIOLOGY
Review the evidence, include a strength and a weakness, and reach a judgement that follows from those points.
Strength S and weakness W, so judgement J in this context.
Original question
Evaluate the claim “this fertiliser always increases yield”, using one illustrative field in one year, with a higher mean yield and no other sites.
Annotated answer
SThe higher mean is a strength for this field and this year. WOne site and one year cannot support the word always, and no statistical test is given. JThe claim is supported for this trial only.
The labels match the frame. Read them in order. This is one accurate route, not the only one.
The judgement has to use the points you have just made.
Treating inhibition on an agar plate as if it established that an infection was cured.
Original practice
Mark points shown after marking
On one agar plate, the clear zone around a disc soaked in a new drug was 4 mm wider than the zone around a water control. A student concluded: “the drug cured the infection”. Evaluate this conclusion. (Illustrative result.)
(3)Total for this question: 3 marks
The wider zone supports greater inhibition than water on this plate. It does not show a cure, a safe dose or activity in a person. Inhibition on an agar plate does not establish that an infection was cured. The conclusion overreaches the evidence.
