AS & A Level Marine Science (9693) — May–June 2025, Paper 13
6 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Fig. 1.1 shows a red mangrove (Rhizophora mangle). The photograph shows the mangrove tree with numerous arching prop roots (also called stilt roots) descending from the trunk and…
Answer this question and get it marked →Sodium chloride is the most abundant salt in sea water. Fig. 2.1 shows the subatomic particles in an atom of sodium, shown as a diagram with a nucleus surrounded by electron…
Answer this question and get it marked →Name the zone in the open ocean that includes the ocean floor.
Answer this question and get it marked →Fig. 4.1 shows a keyhole limpet. The limpet is shown in a photograph, a rounded dome-shaped shell with a small hole at the top, attached to a rocky substrate. The keyhole limpet…
Answer this question and get it marked →Describe the structures and methods that coral polyps use to obtain their nutrition.
Answer this question and get it marked →Fig. 6.1 shows two water molecules. Bond X is labelled between the two molecules (shown as a dotted line between an oxygen of one molecule and a hydrogen of the adjacent…
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