Biology 9700/53 May June 2018 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigating the rate of photosynthesis in algal balls using hydrogencarbonate indicator solution to measure CO₂ uptake.

2. Designing experiments to test the hypothesis relating light intensity to photosynthesis rates, including temperature control.

3. Using pH probes for precise data collection and analyzing pH changes to determine photosynthetic activity under varying light intensities.

4. Assessing the impact of weed killers on photosynthesis rates by conducting t-tests and analyzing p-values for statistical significance.

5. Calculating lionfish prey consumption ratio and evaluating data on local efforts to reduce lionfish populations through fishing.

6. Analyzing 95% confidence intervals in lionfish catch data and determining standard deviations to assess fishing trip impacts.