AS & A Level Marine Science (9693) — May–June 2025, Paper 23
4 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Question 1 · 12 marks · Marine organisms / population monitoring / mark-recapture / ethics
Scientists monitor the population of green turtles, Chelonia mydas, nesting at Raine Island in the Great Barrier Reef. The scientists use a method called mark-recapture (MRC) to…
Answer this question and get it marked →Question 2 · 18 marks · Marine organisms / fish / shark anatomy / labelling
Fig. 2.1 shows a great white shark, Carcharodon carcharias — a photograph of a large, streamlined shark with a white underside and grey upper body, swimming in open water. On Fig.…
Answer this question and get it marked →Question 3 · 22 marks · Ocean / sea water / density / conditions
State three conditions that affect the density of sea water. 1 ......... 2 ......... 3 .........
Answer this question and get it marked →Question 4 · 23 marks · Marine organisms / jellyfish / biological drawing / Cnidaria
Fig. 4.1 shows a barrel jellyfish — a photograph of a large, dome-shaped jellyfish with a white/translucent bell and multiple thick oral arms hanging below it, photographed…
Answer this question and get it marked →