AQA GCSE BIOLOGY Higher Tier Paper 2H 2019.

Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature GCSE BIOLOGY Higher Tier Paper 2H H 2 *02* IB/M/Jun19/8461/2H Do not write outside the Answer all box questions in the spaces provided. 0 1 Figure 1 shows a food chain in a pond. Figure 1 0 1 . 1 Which term describes the Daphnia in this food chain? [1 mark] Tick () one box. Apex predator Primary consumer Producer Secondary consumer 3 *03* Turn over ► IB/M/Jun19/8461/2H Do not write outside the 0 1 box . 2 Draw a pyramid of biomass for the food chain. Label each trophic level. [2 marks] 0 1 . 3 Give one reason why the total biomass of the Daphnia in the pond is different from the total biomass of the algae. [1 mark] Question 1 continues on the next page 4 *04* IB/M/Jun19/8461/2H Do not write outside the Students investigated the size of the population of Daphnia in the pond. box This is the method used. 1. Collect 1 dm3 of pond water from near the edge of the pond. 2. Pour the water through a fine net. 3. Count the number of Daphnia caught in the net. 4. Repeat steps 1–3 four more times. Table 1 shows the results. Table 1 Sample number Number of Daphnia in 1 dm3 water 1 5 2 21 3 0 4 16 5 28 0 1 . 4 Calculate the mean number of Daphnia in 1 m3 of pond water. 1 m3 = 1000 dm3 [2 marks] Mean number of Daphnia in 1 m3 of pond water =