AS & A Level Marine Science (9693) — May–June 2024, Paper 41
5 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Fig. 1.1 is an electron micrograph of Dunaliella, a unicellular green alga. State one function of the cell nucleus.
Answer this question and get it marked →Riftia pachyptila is a tubeworm found at hydrothermal vents. It has no digestive system and relies entirely on bacteria called Endoriftia for nutrition. Outline how Endoriftia…
Answer this question and get it marked →Shrimp aquaculture is used to supply seafood. Mussels have been used to filter waste water from shrimp tanks before it is released into the sea. Outline the process of shrimp…
Answer this question and get it marked →Foraminifera are marine organisms that form calcium carbonate shells. A student investigated the effect of CO₂ concentration on foraminifera shell length and population density.…
Answer this question and get it marked →Atlantic salmon migrate between rivers and the open ocean. Scientists have suggested that international cooperation is needed to conserve salmon populations. Explain why…
Answer this question and get it marked →