Biology 9700 Practical Notes

You will have to plot a line graph or bar chart.

You must be fluent in the tools.

The table is worth 3-4 marks and takes 2 minutes. Yet most students lose marks here. biology 9700 practical notes

You don't need to calculate them by hand (you get a formula sheet), but you MUST know why you choose one.

| Test | When to use | | :--- | :--- | | Chi-squared (( \chi^2 )) | Counted categories (e.g., red vs. white flowers). Looking for association. | | Student's t-test | Comparing means of two groups (e.g., treated vs. untreated plant height). | | Spearman’s rank | Looking for correlation between two variables (e.g., temperature vs. enzyme rate). | You will have to plot a line graph or bar chart

If you forget to calibrate your graticule, you will lose half the page.

Timing: 1 hour 15 min | Weight: 12%

No practical equipment here. Just a pen, a calculator, and your wits. This paper is about error and experimental design.

Paper 3 is divided into two distinct questions: Question 1 (Quantitative/Measurement) and Question 2 (Qualitative/Observation). The golden rule here is simple: Examiners cannot give marks for what they cannot see. You must be fluent in the tools

When the question says, "Design an experiment to investigate..." you must use the P.I.P.E.S. structure in your head.